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Stellar Loci. VII. Photometric Metallicities of 5 Million FGK Stars Based on GALEX GR6+7 AIS and Gaia EDR3 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-28 Xue Lu, Haibo Yuan, Shuai Xu, Ruoyi Zhang, Kai Xiao, Yang Huang, Timothy C. Beers, Jihye Hong
We combine photometric data from GALEX GR6+7 All-Sky Imaging Survey and Gaia Early Data Release 3 with stellar parameters from the SAGA and PASTEL catalogs to construct high-quality training samples for dwarfs (0.4 < BP − RP < 1.6) and giants (0.6 < BP − RP < 1.6). We apply careful reddening corrections using empirical temperature- and extinction-dependent extinction coefficients. Using the two samples
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The First LHAASO Catalog of Gamma-Ray Sources Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-27 Zhen Cao, F. Aharonian, Q. An, Axikegu8, Y. X. Bai, Y. W. Bao, D. Bastieri, X. J. Bi, Y. J. Bi, J. T. Cai, Q. Cao, W. Y. Cao, Zhe Cao, J. Chang, J. F. Chang, A. M. Chen, E. S. Chen, Liang Chen, Lin Chen, Long Chen, M. J. Chen, M. L. Chen, Q. H. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, Y. Chen, N. Cheng, Y. D. Cheng, M. Y. Cui, S. W. Cui, X. H. Cui, Y. D. Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu15
We present the first catalog of very-high-energy and ultra-high-energy gamma-ray sources detected by the Large High Altitude Air Shower Observatory. The catalog was compiled using 508 days of data collected by the Water Cherenkov Detector Array from 2021 March to 2022 September and 933 days of data recorded by the Kilometer Squared Array from 2020 January to 2022 September. This catalog represents
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IRIS2+: A Comprehensive Database of Stratified Thermodynamic Models in the Low Solar Atmosphere Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-27 Alberto Sainz Dalda, Aaryan Agrawal, Bart De Pontieu, Milan Gošić
We present the most comprehensive collection of stratified-in-optical-depth thermodynamic models of the lower solar atmosphere. This database, named IRIS2+, consists of 40,320 synthetic representative profiles (RPs) and their corresponding representative model atmospheres (RMAs). The latter result from inverting the observed RPs, which are the result of clustering multiline spectral profiles observed
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Relations of Rotation and Chromospheric Activity to Stellar Age for FGK Dwarfs from Kepler and LAMOST Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-26 Lifei Ye, Shaolan Bi, Jinghua Zhang, Tiancheng Sun, Liu Long, Zhishuai Ge, Tanda Li, Xianfei Zhang, Xunzhou Chen, Yaguang Li, Jianzhao Zhou, Maosheng Xiang
The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity index logRHK+ , 6077 rotation periods P rot, and variability amplitudes S ph, based on data from LAMOST DR7, Kepler, and Gaia Data Release 3. We find
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He-rich Hot Subdwarf Stars Observed in Gaia DR3 and LAMOST DR7: Carbon and Nitrogen Abundances and Kinematics Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-26 Yangping Luo, Péter Németh, Kun Wang, Yang Pan
We conducted an analysis of the abundances of He, C, and N in 210 He-rich hot subdwarfs observed within both the Gaia Data Release 3 (DR3) and LAMOST DR7 data sets. This analysis involved fitting the LAMOST spectra with Tlusty/Synspec non-LTE synthetic spectra. By examining the Galactic spatial positions, velocity vectors, and orbital parameters of these stars, we determined their Galactic population
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Inferring the Redshift of More than 150 GRBs with a Machine-learning Ensemble Model Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-26 Maria Giovanna Dainotti, Elias Taira, Eric Wang, Elias Lehman, Aditya Narendra, Agnieszka Pollo, Grzegorz M. Madejski, Vahe Petrosian, Malgorzata Bogdan, Apratim Dey, Shubham Bhardwaj
Gamma-ray bursts (GRBs), due to their high luminosities, are detected up to a redshift of 10, and thus have the potential to be vital cosmological probes of early processes in the Universe. Fulfilling this potential requires a large sample of GRBs with known redshifts, but due to observational limitations, only 11% have known redshifts (z). There have been numerous attempts to estimate redshifts via
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The AO327 Drift Survey Catalog and Data Release of Pulsar Detections Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-26 J. S. Deneva, M. McLaughlin, T. E. E. Olszanski, E. F. Lewis, D. Pang, P. C. C. Freire, M. Bagchi, K. Stovall
The AO327 drift survey for radio pulsars and transients used the Arecibo telescope from 2010 until its collapse in 2020. AO327 collected ∼3100 hr of data at 327 MHz with a time resolution of 82 μs and a frequency resolution of 24 kHz. While the main motivation for such surveys is the discovery of new pulsars and new, even unforeseen, types of radio transients, they also serendipitously collect a wealth
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A Study of Broad Emission Line and Doppler Factor Estimation for Fermi Blazars Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-26 Guohai Chen, Zepeng Zheng, Xiangtao Zeng, Lixia Zhang, Hubing Xiao, Xiang Liu, Lang Cui, Junhui Fan
In this work, we obtained a sample of 979 Fermi blazars with broad emission lines, including 701 objects collected from published works and 278 objects developed in this work. For the 278 objects, we made a crossmatch from three catalogs, the Fermi Large Area Telescope Fourth Source Catalog (4FGL), the Sloan Digital Sky Survey, and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, and
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Detection of Solar-like Oscillations in Subgiant and Red Giant Stars Using 2 minute Cadence TESS Data Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-22 Jianzhao Zhou, Shaolan Bi, Jie Yu, Yaguang Li, Xianfei Zhang, Tanda Li, Liu Long, Mengjie Li, Tiancheng Sun, Lifei Ye
Based on all 2 minute cadence TESS light curves from Sector 1 to 60, we provide a catalog of 8651 solar-like oscillators, including frequency at maximum power ( νmax , with its median precision σ = 5.39%), large frequency separation (Δν, σ = 6.22%), and seismically derived masses, radii, and surface gravity values. In this sample, we have detected 2173 new oscillators and added 4373 new Δν measurements
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A Comprehensive Comparison of Various Galactic Cosmic-Ray Models to the State-of-the-art Particle and Radiation Measurements Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-22 Weihao Liu, Jingnan Guo, Yubao Wang, Tony C. Slaba
Galactic cosmic rays (GCRs) are the slowly varying background energetic particles that originate outside the solar system, are modulated by the heliospheric magnetic field, and pose ongoing radiation hazards to deep space exploration missions. To assess the potential radiation risk, various models have been developed to predict the GCR flux near Earth based on propagation theories and/or empirical
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Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. IV. Long-term Doppler Spectroscopy for 11 Stars Thought to Host Cool Giant Exoplanets Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-21 Paul A. Dalba, Stephen R. Kane, Howard Isaacson, Benjamin Fulton, Andrew W. Howard, Edward W. Schwieterman, Daniel P. Thorngren, Jonathan Fortney, Noah Vowell, Corey Beard, Sarah Blunt, Casey L. Brinkman, Ashley Chontos, Fei Dai, Steven Giacalone, Michelle L. Hill, Molly Kosiarek, Jack Lubin, Andrew W. Mayo, Teo Močnik, Joseph M. Akana Murphy, Erik A. Petigura, Malena Rice, Ryan A. Rubenzahl, Judah
Discovering and characterizing exoplanets at the outer edge of the transit method’s sensitivity has proven challenging owing to geometric biases and the practical difficulties associated with acquiring long observational baselines. Nonetheless, a sample of giant exoplanets on orbits longer than 100 days has been identified by transit hunting missions. We present long-term Doppler spectroscopy for 11
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A Comprehensive Correction of the Gaia DR3 XP Spectra Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-21 Bowen Huang, Haibo Yuan, Maosheng Xiang, Yang Huang, Kai Xiao, Shuai Xu, Ruoyi Zhang, Lin Yang, Zexi Niu, Hongrui Gu
By combining spectra from the CALSPEC and NGSL, as well as spectroscopic data from the LAMOST Data Release 7 (DR7), we have analyzed and corrected the systematic errors of the Gaia DR3 BP/RP (XP) spectra. The errors depend on the normalized spectral energy distribution (simplified by two independent “colors”) and G magnitude. Our corrections are applicable in the range of approximately −0.5 < BP −
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Near-real-time 3D Reconstruction of the Solar Coronal Parameters Based on the Magnetohydrodynamic Algorithm outside a Sphere Using Deep Learning Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-21 Sumiaya Rahman, Hyun-Jin Jeong, Ashraf Siddique, Yong-Jae Moon, Bendict Lawrance
For the first time, we generate solar coronal parameters (density, magnetic field, radial velocity, and temperature) on a near-real-time basis by deep learning. For this, we apply the Pix2PixCC deep-learning model to three-dimensional (3D) distributions of these parameters: synoptic maps of the photospheric magnetic field as an input and the magnetohydrodynamic algorithm outside a sphere (MAS) results
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The Measurement of Masses of OB-type Stars from LAMOST DR5 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-21 Zhenyan Huo, Zhicun Liu, Wenyuan Cui, Chao Liu, Jiaming Liu, Mingxu Sun, Shuai Feng, Linlin Li
The measurements of masses and luminosities of massive stars play an important role in understanding the formation and evolution of their host galaxies. In this work, we present the measurement of masses and luminosities of 2946 OB-type stars, including 78 O-type stars and 2868 B-type stars, based on their stellar parameters (effective temperature, surface gravity, and metallicity) and the Padova and
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A Comparative Analysis of the Solar Ultraviolet Spectral Irradiance Measured from Earth and Mars: Toward a General Empirical Model for the Study of Planetary Aeronomy Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-20 Zhen Xu, Jianqi Qin
Accurate estimation of the solar vacuum ultraviolet irradiance between 0.1 and 200 nm is critical for the study of planetary aeronomy. Previous empirical models have relied on a limited number of reference spectra, or on multiple data sets with various degrees of uncertainty, and on an empirical selection of solar proxies. Here we propose a novel method for the development of empirical models based
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Identification of Carbon Stars from LAMOST DR7 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-20 Linlin Li, Kecheng Zhang, Wenyuan Cui, Jianrong Shi, Wei Ji, Zhenyan Huo, Yawei Gao, Shuai Zhang, Mingxu Sun
Carbon stars are excellent kinematic tracers of galaxies and play important roles in understanding the evolution of the Galaxy. Therefore, it is worthwhile to search for them in a large number of spectra. In this work, we build a new carbon star catalog based on the Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) DR7 spectra. The catalog contains 4542 spectra of 3546 carbon stars
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Broadband Multiwavelength Study of LHAASO-detected Active Galactic Nuclei Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-15 Ze-Rui Wang, Rui Xue, Dingrong Xiong, Hai-Qin Wang, Lu-Ming Sun, Fang-Kun Peng, Jirong Mao
Recently, the Large High Altitude Air Shower Observatory (LHAASO) collaboration presented the first catalog of γ-ray sources using 508 days of LHAASO data, from 2021 March to 2022 September. This catalog contains four blazars and a possible LINER-type active galactic nucleus (AGN) counterpart. In this work, we establish averaged multiwavelength spectral energy distributions (SEDs) by combining data
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A Fast Second-order Solver for Stiff Multifluid Dust and Gas Hydrodynamics Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-14 Leonardo Krapp, Juan Garrido-Deutelmoser, Pablo Benítez-Llambay, Kaitlin M. Kratter
We present MDIRK: a multifluid second-order diagonally implicit Runge–Kutta method to study momentum transfer between gas and an arbitrary number (N) of dust species. The method integrates the equations of hydrodynamics with an implicit–explicit scheme and solves the stiff source term in the momentum equation with a diagonally implicit, asymptotically stable Runge–Kutta method (DIRK). In particular
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A Multibranch Deep Neural Network for the Superresolution of Solar Magnetograms Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-14 Fengping Dou, Long Xu, Dong Zhao, Zhixiang Ren
The existing superresolution (SR) models for solar magnetograms are mostly borrowed from the SR models for natural images. They are less effective for processing solar magnetograms with a very large dynamic range and very rich image features. In this paper, a multibranch superresolution (MBSR) model is specially designed for solar magnetograms. First, we split a low-resolution magnetogram into a group
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Powerful Radio Sources in the Southern Sky. III. First Results of the Optical Spectroscopic Campaign Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-14 A. García-Pérez, H. A. Peña-Herazo, A. Jimenez-Gallardo, V. Chavushyan, F. Massaro, S. V. White, A. Capetti, B. Balmaverde, W. R. Forman, C. C. Cheung, J. P. Madrid, C. Mazzucchelli, N. P. H. Nesvadba, I. Andruchow, S. Cellone, R. Grossová, A. Paggi, E. Sani, V. Reynaldi, R. P. Kraft, C. Leto
We recently built the G4Jy-3CRE catalog of extragalactic radio sources. This catalog lists 264 powerful radio sources selected with similar criteria to those of the revised Third Cambridge Catalog, but visible from the Southern Hemisphere. A literature search revealed that 119 sources in the G4Jy-3CRE catalog (i.e., 45%) lack a firm spectroscopic redshift measurement. Here, we present a campaign aimed
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The Hubble Deep Hydrogen Alpha (HDHα) Project. I. Catalog of Emission-line Galaxies Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-13 Shuairu Zhu, Zhen-Ya Zheng, James Rhoads, Junxian Wang, Linhua Jiang, Chunyan Jiang, Fang-Ting Yuan, P. T. Rahna, Weida Hu, Ruqiu Lin, Huanyuan Shan, Chun Xu, Leopoldo Infante, L. Felipe Barrientos, Xianzhong Zheng, Guanwen Fang, Zhixiong Liang
We present the first results of the Hubble Deep Hydrogen Alpha (HDHα) project, which analyzes the space-borne deep Hα narrowband imaging data in the GOODS-S region. The HDHα data comprises 72 orbits’ images taken with the Hubble Space Telescope (HST) Advanced Camera for Surveys/Wide Field Channel F658N filter. The exposure time varies across a total area of ∼76.1 arcmin2, adding up to a total exposure
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A Community Data Set for Comparing Automated Coronal Hole Detection Schemes Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-13 Martin A. Reiss, Karin Muglach, Emily Mason, Emma E. Davies, Shibaji Chakraborty, Veronique Delouille, Cooper Downs, Tadhg M. Garton, Jeremy A. Grajeda, Amr Hamada, Stephan G. Heinemann, Stefan Hofmeister, Egor Illarionov, Robert Jarolim, Larisza Krista, Chris Lowder, Erwin Verwichte, Charles N. Arge, Laura E. Boucheron, Claire Foullon, Michael S. Kirk, Alexander Kosovichev, Andrew Leisner, Christian
Automated detection schemes are nowadays the standard approach for locating coronal holes in extreme-UV images from the Solar Dynamics Observatory (SDO). However, factors such as the noisy nature of solar imagery, instrumental effects, and others make it challenging to identify coronal holes using these automated schemes. While discrepancies between detection schemes have been noted in the literature
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Projected Rotational Velocities for LAMOST Stars with Effective Temperatures Lower than 9000 K Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-12 Fang Zuo, A-Li Luo, Bing Du, Yinbi Li, Hugh R. A. Jones, Yi-han Song, Xiao Kong, Yan-xin Guo
In Data Release 9 of LAMOST, we present measurements of v sin i for a total of 121,698 stars measured using the Medium Resolution Spectrograph (MRS) and 80,108 stars using the Low Resolution Spectrograph (LRS). These values were obtained through a χ 2 minimization process, comparing LAMOST spectra with corresponding grids of synthetically broadened spectra. Due to the resolution and the spectral range
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The First Ka-band (26.1–35 GHz) Blind Line Survey toward Orion KL Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-12 Xunchuan Liu, Tie Liu, Zhiqiang Shen, Sheng-Li Qin, Qiuyi Luo, Yan Gong, Yu Cheng, Christian Henkel, Qilao Gu, Fengyao Zhu, Tianwei Zhang, Rongbing Zhao, Yajun Wu, Bin Li, Juan Li, Zhang Zhao, Jinqing Wang, Weiye Zhong, Qinghui Liu, Bo Xia, Li Fu, Zhen Yan, Chao Zhang, Lingling Wang, Qian Ye, Aiyuan Yang, Fengwei Xu, Chao Zhang, Somnath Dutta, Shanghuo Li, Meizhu Liu, Dongting Yang, Chuanshou Li, Li
We conducted a Ka-band (26.1–35 GHz) line survey toward Orion KL using the TianMa 65 m Radio Telescope (TMRT). It is the first blind line survey in the Ka band and achieves a sensitivity at the mK level (1–3 mK at a spectral resolution of ∼1 km s−1). In total, 592 Gaussian features are extracted. Among them, 257 radio recombination lines (RRLs) are identified. The maximum Δn of RRLs of H, He, and C
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On the Significance of the Thick Disks of Disk Galaxies Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-12 Sukyoung K. Yi, J. K. Jang, Julien Devriendt, Yohan Dubois, San Han, Taysun Kimm, Katarina Kraljic, Minjung Park, Sebastien Peirani, Christophe Pichon, Jinsu Rhee
Thick disks are a prevalent feature observed in numerous disk galaxies, including our own Milky Way. Their significance has been reported to vary widely, ranging from a few percent to 100% of the disk mass, depending on the galaxy and the measurement method. We use the NewHorizon simulation, which has high spatial and stellar mass resolutions, to investigate the issue of the thick-disk mass fraction
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The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-12 Hamid Hassani, Erik Rosolowsky, Eric W. Koch, Joseph Postma, Joseph Nofech, Harrisen Corbould, David Thilker, Adam K. Leroy, Eva Schinnerer, Francesco Belfiore, Frank Bigiel, Médéric Boquien, Mélanie Chevance, Daniel A. Dale, Oleg V. Egorov, Eric Emsellem, Simon C. O. Glover, Kathryn Grasha, Brent Groves, Kiana Henny, Jaeyeon Kim, Ralf S. Klessen, Kathryn Kreckel, J. M. Diederik Kruijssen, Janice C
We present the Physics at High Angular resolution in Nearby GalaxieS (PHANGS)-AstroSat atlas, which contains UV imaging of 31 nearby star-forming galaxies captured by the Ultraviolet Imaging Telescope on the AstroSat satellite. The atlas provides a homogeneous data set of far-UV and near-UV maps of galaxies within a distance of 22 Mpc and a median angular resolution of 1.″4 (corresponding to a physical
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Differentiable Cosmological Simulation with the Adjoint Method Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-06 Yin Li, Chirag Modi, Drew Jamieson, Yucheng Zhang, Libin Lu, Yu Feng, François Lanusse, Leslie Greengard
Rapid advances in deep learning have brought not only a myriad of powerful neural networks, but also breakthroughs that benefit established scientific research. In particular, automatic differentiation (AD) tools and computational accelerators like GPUs have facilitated forward modeling of the Universe with differentiable simulations. Based on analytic or automatic backpropagation, current differentiable
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Molecular Deuterations in Massive Starless Clump Candidates Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-05 Kai Yang, Junzhi Wang, Keping Qiu, Tianwei Zhang
Deuterated molecules are valuable probes for investigating the evolution and the kinematics in the earliest stages of star formation. In this study, we conduct a comprehensive investigation by performing a single-point survey of 101 starless clump candidates, and carrying out on-the-fly (OTF) observations of 11 selected sources, focusing on deuterated molecular lines using the IRAM 30 m telescope.
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Is the Atmosphere of the Ultra-hot Jupiter WASP-121 b Variable? Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-05 Q. Changeat, J. W. Skinner, J. Y-K. Cho, J. Nättilä, I. P. Waldmann, A. F. Al-Refaie, A. Dyrek, B. Edwards, T. Mikal-Evans, M. Joshua, G. Morello, N. Skaf, A. Tsiaras, O. Venot, K. H. Yip
We present a comprehensive analysis of the Hubble Space Telescope observations of the atmosphere of WASP-121 b, an ultra-hot Jupiter. After reducing the transit, eclipse, and phase-curve observations with a uniform methodology and addressing the biases from instrument systematics, sophisticated atmospheric retrievals are used to extract robust constraints on the thermal structure, chemistry, and cloud
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Simulating the Photospheric to Coronal Plasma Using Magnetohydrodynamic Characteristics. I. Data-driven Boundary Conditions Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-02 Lucas A. Tarr, N. Dylan Kee, Mark G. Linton, Peter W. Schuck, James E. Leake
We develop a general description of how information propagates through a magnetohydrodynamic (MHD) system based on the method of characteristics and use that to formulate numerical boundary conditions that are intrinsically consistent with the MHD equations. Our formulation includes two major advances for simulations of the Sun. First, we derive data-driven boundary conditions that optimally match
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Zero and Extremely Low-metallicity Rotating Massive Stars: Evolution, Explosion, and Nucleosynthesis Up to the Heaviest Nuclei Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-02 Lorenzo Roberti, Marco Limongi, Alessandro Chieffi
We present the evolution and the explosion of two massive stars, 15 and 25 M ⊙, spanning a wide range of initial rotation velocities (from 0 to 800 km s−1) and three initial metallicities: Z = 0 ([Fe/H] = −∞), 3.236 × 10−7 ([Fe/H] = −5), and 3.236 × 10−6 ([Fe/H] = −4). A very large nuclear network of 524 nuclear species extending up to Bi has been adopted. Our main findings may be summarized as follows:
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Stellar Atmospheric Parameters for Cool Dwarfs in Gaia Data Release 3 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-01 Cai-Xia Qu, A-Li Luo, Rui Wang, Hugh R. A. Jones, Bing Du, Xiang-Lei Chen, You-Fen Wang
We provide a catalog of atmospheric parameters for 1,806,921 cool dwarfs from Gaia Data Release 3 (DR3) that lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T eff < 4300 K, −0.8 < [M/H] < 0.2 dex, and 4.5 < log g < 5.5 dex. Our values are derived based on machine-learning models trained with multiband photometry corrected for dust. The photometric data comprise
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The MeerKAT Absorption Line Survey (MALS) Data Release. I. Stokes I Image Catalogs at 1–1.4 GHz Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-01 P. P. Deka, N. Gupta, P. Jagannathan, S. Sekhar, E. Momjian, S. Bhatnagar, J. Wagenveld, H.-R. Klöckner, J. Jose, S. A. Balashev, F. Combes, M. Hilton, D. Borgaonkar, A. Chatterjee, K. L. Emig, A. N. Gaunekar, G. I. G. Józsa, D. Y. Klutse, K. Knowles, J.-K. Krogager, A. Mohapatra, K. Moodley, Sébastien Muller, P. Noterdaeme, P. Petitjean, P. Salas, S. Sikhosana
The MeerKAT Absorption Line Survey (MALS) has observed 391 telescope pointings at the L band (900–1670 MHz) at δ ≲ +20°. We present radio continuum images and a catalog of 495,325 (240,321) radio sources detected at a signal-to-noise ratio (S/N) > 5 over an area of 2289 deg2 (1132 deg2) at 1006 MHz (1381 MHz). Every MALS pointing contains a central bright radio source (S 1 GHz ≳ 0.2 Jy). The median
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Improving Solar Energetic Particle Event Prediction through Multivariate Time Series Data Augmentation Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-02-01 Pouya Hosseinzadeh, Soukaina Filali Boubrahimi, Shah Muhammad Hamdi
Solar energetic particles (SEPs) are associated with extreme solar events that can cause major damage to space- and ground-based life and infrastructure. High-intensity SEP events, particularly ∼100 MeV SEP events, can pose severe health risks for astronauts owing to radiation exposure and affect Earth’s orbiting satellites (e.g., Landsat and the International Space Station). A major challenge in the
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Evolution and Final Fate of Solar Metallicity Stars in the Mass Range 7–15 M ⊙. I. The Transition from Asymptotic Giant Branch to Super-AGB Stars, Electron Capture, and Core-collapse Supernova Progenitors Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-30 Marco Limongi, Lorenzo Roberti, Alessandro Chieffi, Ken’ichi Nomoto
According to a standard initial mass function, stars in the range 7–12 M ⊙ constitute ∼50% (by number) of the stars more massive than ∼7 M ⊙, but in spite of this, their evolutionary properties, and in particular their final fate, are still scarcely studied. In this paper, we present a detailed study of the evolutionary properties of solar metallicity nonrotating stars in the range 7–15 M ⊙, from the
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The Presolar Grain Database. I. Silicon Carbide Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-29 Thomas Stephan, Reto Trappitsch, Peter Hoppe, Andrew M. Davis, Maitrayee Bose, Asmaa Boujibar, Frank Gyngard, K. Mairin Hynes, Nan Liu, Larry R. Nittler, Ryan C. Ogliore
The Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009. It has been a helpful tool used by many researchers in cosmochemistry and astrophysics. However, over the years, accumulated errors compromised major parts of the PGD. Here, we provide a fresh start, with the PGD
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Changing-look Active Galactic Nuclei from the Dark Energy Spectroscopic Instrument. I. Sample from the Early Data Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-29 Wei-Jian Guo, Hu Zou, Victoria A. Fawcett, Rebecca Canning, Stephanie Juneau, Tamara M. Davis, David M. Alexander, Linhua Jiang, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd Claybaugh, Axel de la Macorra, Peter Doel, Kevin Fanning, Jaime E. Forero-Romero, Satya Gontcho A Gontcho, Klaus Honscheid, Theodore Kisner, Anthony Kremin, Martin Landriau, Aaron Meisner, Ramon Miquel, John Moustakas
Changing-look active galactic nuclei (CL AGNs) can be generally confirmed by the emergence (turn-on) or disappearance (turn-off) of broad emission lines (BELs), associated with a transient timescale (about 100 ∼ 5000 days) that is much shorter than predicted by traditional accretion disk models. We carry out a systematic CL AGN search by crossmatching the spectra coming from the Dark Energy Spectroscopic
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Fast Generation of Mock Galaxy Catalogs with COLA Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-29 Jiacheng Ding, Shaohong Li, Yi Zheng, Xiaolin Luo, Le Zhang, Xiao-Dong Li
We investigate the feasibility of using the comoving Lagrangian acceleration (COLA) technique to efficiently generate galaxy mock catalogs that can accurately reproduce the statistical properties of observed galaxies. Our proposed scheme combines the subhalo abundance-matching (SHAM) procedure with COLA simulations, using only three free parameters: the scatter magnitude (σ scat) in SHAM, the initial
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Measuring the Hubble Constant of Binary Neutron Star and Neutron Star–Black Hole Coalescences: Bright Sirens and Dark Sirens Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-22 Jiming Yu, Zhengyan Liu, Xiaohu Yang, Yu Wang, Pengjie Zhang, Xin Zhang, Wen Zhao
Observations of gravitational waves (GW) provide us with a new probe to study the Universe. GW events can be used as standard sirens if their redshifts are measured. Normally, standard sirens can be divided into bright/dark sirens according to whether the redshifts are measured by electromagnetic (EM) counterpart observations. First, we investigate the capability of the 2.5 m Wide-Field Survey Telescope
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A Nonparametric Reconstruction of the Hubble Parameter H(z) Based on Radial Basis Function Neural Networks Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-22 Jian-Chen Zhang, Yu Hu, Kang Jiao, Hong-Feng Wang, Yuan-Bo Xie, Bo Yu, Li-Li Zhao, Tong-Jie Zhang
Accurately measuring the Hubble parameter is vital for understanding the expansion history and properties of the Universe. In this paper, we propose a new method that supplements the covariance between redshift pairs to improve the reconstruction of the Hubble parameter using the observational Hubble data set. Our approach uses a cosmological model-independent radial basis function neural network to
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GeV Variability Properties of TeV Blazars Detected by Fermi-LAT Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-19 Gege Wang, Hubing Xiao, Junhui Fan, Xin Zhang
Variability is a prominent observational feature of blazars. The high-energy radiation mechanism of jets has always been important but is still unclear. In this work, we performed a detailed analysis using Fermi-LAT data across 15 yr and obtained GeV light-curve information for 78 TeV blazars detected by Fermi. We provided annual GeV fluxes and corresponding spectral indices for the 78 TeV blazars
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The Distribution of Semidetached Binaries. I. An Efficient Pipeline Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-18 Jianping Xiong, Xu Ding, Jiadong Li, Hongwei Ge, Qiyuan Cheng, Kaifan Ji, Zhanwen Han, Xuefei Chen
Semidetached binaries are in the stage of mass transfer and play a crucial role in studying the physics of mass transfer between interacting binaries. Large-scale time-domain surveys provide many light curves of binary systems, while Gaia offers high-precision astrometric data. In this paper, we develop, validate, and apply a pipeline that combines the Markov Chain Monte Carlo method with a forward
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MeerKAT 1.3 GHz Observations of Supernova Remnants Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-18 W. D. Cotton, R. Kothes, F. Camilo, P. Chandra, S. Buchner, M. Nyamai
We present full Stokes MeerKAT L-band (856–1712 MHz) observations of 36 high-latitude supernova remnants (SNRs). Sensitive, high-dynamic-range images show a wealth of structure. G15.1−1.6 appears to be a H ii region rather than an SNR. G30.7−2.0 consists of three background extragalactic sources which appear to form an arc when imaged with much lower resolution. At least half of the remnants in the
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Fourteen Years of Energetic Neutral Atom Observations from IBEX Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-17 D. J. McComas, M. Alimaganbetov, L. J. Beesley, M. Bzowski, H. O. Funsten, P. H. Janzen, M. A. Kubiak, J. S. Rankin, D. B. Reisenfeld, N. A. Schwadron, J. R. Szalay
The Interstellar Boundary Explorer (IBEX) has been observing the outer heliosphere and its interactions with the very local interstellar medium (VLISM) via measurements of energetic neutral atoms (ENAs) for over 14 yr. We discovered the IBEX Ribbon—a structure completely unanticipated by any prior theory or model—that almost certainly resides beyond the heliopause in the VLISM. We also characterized
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Studying the Spheromak Rotation in Data-constrained Coronal Mass Ejection Modeling with EUHFORIA and Assessing Its Effect on the B z Prediction Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-17 Ranadeep Sarkar, Jens Pomoell, Emilia Kilpua, Eleanna Asvestari, Nicolas Wijsen, Anwesha Maharana, Stefaan Poedts
A key challenge in space weather forecasting is accurately predicting the magnetic field topology of interplanetary coronal mass ejections (ICMEs), specifically the north–south magnetic field component (B z ) for Earth-directed CMEs. Heliospheric MHD models typically use spheromaks to represent the magnetic structure of CMEs. However, when inserted into the ambient interplanetary magnetic field, spheromaks
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An Efficient Algorithm for Astrochemical Systems Using Stoichiometry Matrices Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-17 Kazutaka Motoyama, Ruben Krasnopolsky, Hsien Shang, Kento Aida, Eisaku Sakane
Astrochemical simulations are a powerful tool for revealing chemical evolution in the interstellar medium. Astrochemical calculations require efficient processing of large matrices for the chemical networks. The large chemical reaction networks often present bottlenecks for computation because of time derivatives of chemical abundances. We propose an efficient algorithm using a stoichiometry matrix
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Cross Correlation between the Thermal Sunyaev–Zeldovich Effect and the Integrated Sachs–Wolfe Effect Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-12 Ayodeji Ibitoye, Wei-Ming Dai, Yin-Zhe Ma, Patricio Vielva, Denis Tramonte, Amare Abebe, Aroonkumar Beesham, Xuelei Chen
We present a joint cosmological analysis of the power spectra measurement of the Planck Compton parameter and the integrated Sachs–Wolfe (ISW) maps. We detect the statistical correlation between the Planck thermal Sunyaev–Zeldovich (tSZ) map and ISW data with a significance of a 3.6σ confidence level (CL), with the autocorrelation of the Planck tSZ data being measured at a 25σ CL. The joint auto- and
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Long-term Variations in the Orbital Period of Hot Jupiters from Transit-timing Analysis Using TESS Survey Data Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-11 Wenqin Wang, Zixin Zhang, Zhangliang Chen, Yonghao Wang, Cong Yu, Bo Ma
Many hot Jupiters may experience orbital decays, which are manifested as long-term transit-timing variations. We have analyzed 7068 transits from the Transiting Exoplanet Survey Satellite (TESS) for a sample of 326 hot Jupiters. These new mid-transit-time data allow us to update ephemerides for these systems. By combining the new TESS transit-timing data with archival data, we searched for possible
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Predicting Solar Proton Events of Solar Cycles 22–24 Using GOES Proton and Soft-X-Ray Flux Features Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-11 Aatiya Ali, Viacheslav Sadykov, Alexander Kosovichev, Irina N. Kitiashvili, Vincent Oria, Gelu M. Nita, Egor Illarionov, Patrick M. O’Keefe, Fraila Francis, Chun-Jie Chong, Paul Kosovich, Russell D. Marroquin
Solar energetic particle (SEP) events and their major subclass, solar proton events (SPEs), can have unfavorable consequences on numerous aspects of life and technology, making them one of the most harmful effects of solar activity. Garnering knowledge preceding such events by studying operational data flows is essential for their forecasting. Considering only solar cycle (SC) 24 in our previous study
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Systematic Search for Water Fountain Candidates Using the Databases of Circumstellar Maser Sources Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2024-01-08 Haichen Fan, Jun-ichi Nakashima, D. Engels, Yong Zhang, Jian-Jie Qiu, Huan-Xue Feng, Jia-Yong Xie, Hiroshi Imai, Chih-Hao Hsia
Water fountains (WFs) are thought to be objects in the morphological evolution of the circumstellar envelopes of low- and intermediate-mass evolved stars, transitioning from spherically symmetric to asymmetric shapes. We used databases of circumstellar 1612 MHz OH and 22.235 GHz H2O maser sources to search for new WF candidates using the criterion of a larger velocity range of the H2O maser emission
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Identification of Blue Horizontal-branch Stars from LAMOST DR5 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-28 Jie Ju, Wenyuan Cui, Zhenyan Huo, Chao Liu, Xiangxiang Xue, Jiaming Liu, Shuai Feng, Mingxu Sun, Linlin Li
We construct a new catalog of the blue horizontal-branch (BHB) stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR5 data set, which contains 5355 + 81 BHB stars at high Galactic latitude (∣Glat∣ > 20°). We combine the spectral line indices with a set of Balmer line profile selection criteria to identify the BHB stars. During the selection process, we use the line index
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SWASTi-CME: A Physics-based Model to Study Coronal Mass Ejection Evolution and Its Interaction with Solar Wind Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-28 Prateek Mayank, Bhargav Vaidya, Wageesh Mishra, D. Chakrabarty
Coronal mass ejections (CMEs) are primary drivers of space weather, and studying their evolution in the inner heliosphere is vital to prepare for a timely response. Solar wind streams, acting as background, influence their propagation in the heliosphere and associated geomagnetic storm activity. This study introduces SWASTi-CME, a newly developed MHD-based CME model integrated into the Space Weather
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The UNCOVER Survey: A First-look HST+JWST Catalog of Galaxy Redshifts and Stellar Population Properties Spanning 0.2 ≲ z ≲ 15 Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-28 Bingjie Wang, Joel Leja, Ivo Labbé, Rachel Bezanson, Katherine E. Whitaker, Gabriel Brammer, Lukas J. Furtak, John R. Weaver, Sedona H. Price, Adi Zitrin, Hakim Atek, Dan Coe, Sam E. Cutler, Pratika Dayal, Pieter van Dokkum, Robert Feldmann, Danilo Marchesini, Marijn Franx, Natascha Förster Schreiber, Seiji Fujimoto, Marla Geha, Karl Glazebrook, Anna de Graaff, Jenny E. Greene, Stéphanie Juneau, Susan
The recent UNCOVER survey with the James Webb Space Telescope (JWST) exploits the nearby cluster A2744 to create the deepest view of our Universe to date by leveraging strong gravitational lensing. In this work, we perform photometric fitting of more than 50,000 robustly detected sources out to z ∼ 15. We show the redshift evolution of stellar ages, star formation rates, and rest-frame colors across
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The ALMA Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE): Core Growth, Cluster Contraction, and Primordial Mass Segregation Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-28 Fengwei Xu, Ke Wang, Tie Liu, Mengyao Tang, Neal J. Evans II, Aina Palau, Kaho Morii, Jinhua He, Patricio Sanhueza, Hong-Li Liu, Amelia Stutz, Qizhou Zhang, Xi Chen, Pak Shing Li, Gilberto C. Gómez, Enrique Vázquez-Semadeni, Shanghuo Li, Xiaofeng Mai, Xing Lu, Meizhu Liu, Li Chen, Chuanshou Li, Hongqiong Shi, Zhiyuan Ren, Di Li, Guido Garay, Leonardo Bronfman, Lokesh Dewangan, Mika Juvela, Chang Won
The Atacama Large Millimeter/submillimeter Array (ALMA) Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE) aims to investigate the process of mass assembly and its connection to high-mass star formation theories in protoclusters in a dynamic view. We observed 11 massive (M clump ≳ 103 M ⊙), luminous (L bol ≳ 104 L ⊙), and blue-profile (infall signature) clumps
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The Kepler Giant Planet Search. I. A Decade of Kepler Planet-host Radial Velocities from W. M. Keck Observatory Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-27 Lauren M. Weiss, Howard Isaacson, Andrew W. Howard, Benjamin J. Fulton, Erik A. Petigura, Daniel Fabrycky, Daniel Jontof-Hutter, Jason H. Steffen, Hilke E. Schlichting, Jason T. Wright, Corey Beard, Casey L. Brinkman, Ashley Chontos, Steven Giacalone, Michelle L. Hill, Molly R. Kosiarek, Mason G. MacDougall, Teo Močnik, Alex S. Polanski, Emma V. Turtelboom, Dakotah Tyler, Judah Van Zandt
Despite the importance of Jupiter and Saturn to Earth’s formation and habitability, there has not yet been a comprehensive observational study of how giant exoplanets correlate with the architectural properties of close-in, sub-Neptune-sized exoplanets. This is largely because transit surveys are particularly insensitive to planets at orbital separations ≳1 au, and so their census of Jupiter-like planets
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The UNCOVER Survey: A First-look HST + JWST Catalog of 60,000 Galaxies near A2744 and beyond Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-22 John R. Weaver, Sam E. Cutler, Richard Pan, Katherine E. Whitaker, Ivo Labbé, Sedona H. Price, Rachel Bezanson, Gabriel Brammer, Danilo Marchesini, Joel Leja, Bingjie Wang, Lukas J. Furtak, Adi Zitrin, Hakim Atek, Iryna Chemerynska, Dan Coe, Pratika Dayal, Pieter van Dokkum, Robert Feldmann, Natascha M. Förster Schreiber, Marijn Franx, Seiji Fujimoto, Yoshinobu Fudamoto, Karl Glazebrook, Anna de Graaff
In 2022 November, the James Webb Space Telescope (JWST) returned deep near-infrared images of A2744—a powerful lensing cluster capable of magnifying distant, incipient galaxies beyond it. Together with existing Hubble Space Telescope (HST) imaging, this publicly available data set opens a fundamentally new discovery space to understand the remaining mysteries of the formation and evolution of galaxies
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Maximum Aligned Directional Derivative (MADD) Technique for Planar Structure Analysis in Space Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-22 Y. Y. Liu, H. S. Fu, J. B. Cao, C. X. Du, W. Z. Zhang
Interplanetary discontinuities are the most common intermittent structures in the solar winds, whose jump conditions conform to the Rankine–Hugoniot relations. The identification and analysis of such planar structures rely on an accurate determination of the normal vectors. In this study, we perform a benchmark test of a technique designed to estimate the dimensionality and orientation of the magnetic
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Stellar Neutrino Emission across the Mass–Metallicity Plane Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-19 Ebraheem Farag, F. X. Timmes, Morgan T. Chidester, Samalka Anandagoda, Dieter H. Hartmann
We explore neutrino emission from nonrotating, single-star models across six initial metallicities and 70 initial masses from the zero-age main sequence to the final fate. Overall, across the mass spectrum, we find metal-poor stellar models tend to have denser, hotter, and more massive cores with lower envelope opacities, larger surface luminosities, and larger effective temperatures than their metal-rich
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Calibration of the Timing Performance of GECAM-C Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-12 Shuo Xiao, Ya-Qing Liu, Ke Gong, Zheng-Hua An, Shao-Lin Xiong, Xin-Qiao Li, Xiang-Yang Wen, Wen-Xi Peng, Da-Li Zhang, You-Li Tuo, Shi-Jie Zheng, Li-Ming Song, Ping Wang, Xiao-Yun Zhao, Yue Huang, Xiang Ma, Xiao-Jing Liu, Rui Qiao, Yan-Bing Xu, Sheng Yang, Fan Zhang, Yue Wang, Yan-Qiu Zhang, Wang-Chen Xue, Jia-Cong Liu, Chao Zheng, Chen-Wei Wang, Wen-Jun Tan, Ce Cai, Qi-Bin Yi, Peng Zhang, Xi-Hong Luo
As a new member of the Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) after GECAM-A and GECAM-B, GECAM-C (originally called HEBS), which was launched on board the SATech-01 satellite on 2022 July 27, aims to monitor and localize X-ray and gamma-ray transients from ∼6 keV to 6 MeV. GECAM-C utilizes a similar design to GECAM but operates in a more complex orbital environment
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Experimental Phase Function and Degree of Linear Polarization of Light Scattered by Hydrogenated Amorphous Carbon Circumstellar Dust Analogs Astrophys. J. Suppl. Ser. (IF 8.7) Pub Date : 2023-12-12 Juan Carlos Gómez Martín, Olga Muñoz, Julia Martikainen, Daniel Guirado, Isabel Tanarro, Ramón J. Peláez, Belén Maté, Miguel Jiménez-Redondo, Víctor J. Herrero, Marco Peiteado, Teresa Jardiel
Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars. These observations have helped determine the diameter and width of dust shells around stars with unprecedented accuracy. Simple geometric particle models are used in order to retrieve dust properties from these observations. In this work