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  • First Fermi-LAT Solar Flare Catalog
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-19
    M. Ajello, L. Baldini, D. Bastieri, R. Bellazzini, A. Berretta, E. Bissaldi, R. D. Blandford, R. Bonino, P. Bruel, S. Buson, R. A. Cameron, R. Caputo, E. Cavazzuti, C. C. Cheung, G. Chiaro, D. Costantin, S. Cutini, F. D’Ammando, F. de Palma, R. Desiante, N. Di Lalla, L. Di Venere, F. Fana Dirirsa, S. J. Fegan, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, F. Giordano, M. Giroletti, D.

    We present the first Fermi-Large Area Telescope (LAT) solar flare catalog covering the 24th solar cycle. This catalog contains 45 Fermi-LAT solar flares (FLSFs) with emission in the γ -ray energy band (30 MeV–10 GeV) detected with a significance of ≥5 σ over the years 2010–2018. A subsample containing 37 of these flares exhibits delayed emission beyond the prompt-impulsive hard X-ray phase, with 21

    更新日期:2021-01-19
  • Placing High-redshift Quasars in Perspective: A Catalog of Spectroscopic Properties from the Gemini Near Infrared Spectrograph–Distant Quasar Survey
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-19
    Brandon M. Matthews, Ohad Shemmer, Cooper Dix, Michael S. Brotherton, Adam D. Myers, I. Andruchow, W. N. Brandt, Gabriel A. Ferrero, S. C. Gallagher, Richard Green, Paulina Lira, Richard M. Plotkin, Gordon T. Richards, Jessie C. Runnoe, Donald P. Schneider, Yue Shen, Michael A. Strauss, and Beverley J. Wills

    We present spectroscopic measurements for 226 sources from the Gemini Near Infrared Spectrograph–Distant Quasar Survey (GNIRS-DQS). Being the largest uniform, homogeneous survey of its kind, it represents a flux-limited sample ( m i ≲ 19.0 mag, H ≲ 16.5 mag) of Sloan Digital Sky Survey (SDSS) quasars at 1.5 ≲ z ≲ 3.5 with a monochromatic luminosity ( ##IMG## [http://ej.iop.org/images/0067-0049/252

    更新日期:2021-01-19
  • Efficient Direct Method for Self-gravity in 3D, Accelerated by a Fast Fourier Transform
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-19
    Ruben Krasnopolsky, Mario Ponce Martínez, Hsien Shang, Yao-Huan Tseng, and Chien-Chang Yen

    Self-gravity calculations for 3D are expensive in terms of computational time. Several methods exist for this computation, for example multigrid and spectral methods. Unfortunately, these approaches require the imposition of boundary conditions, which can be either numerically expensive (direct Newtonian sums), artificial (periodicity assumptions), or potentially imprecise (multipolar expansions).

    更新日期:2021-01-19
  • The Spectrum and Term Analysis of Singly Ionized Manganese
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-13
    Florence S. Liggins, Juliet C. Pickering, Gillian Nave, Jacob W. Ward, and W.-Ü L. Tchang-Brillet

    An extensive analysis of the Mn spectrum was carried out using high-resolution Fourier transform (FT) and grating spectroscopy of Mn–Ne and Mn–Ar hollow cathode discharge sources, over the range 82–5500 nm (1820–121,728 cm −1 ). Spectral wavelengths for a total of 6019 Mn ii lines have been measured, of which 1345 are obtained through FT spectroscopy. These wavelengths are given to at least an order

    更新日期:2021-01-13
  • Solar Bayesian Analysis Toolkit—A New Markov Chain Monte Carlo IDL Code for Bayesian Parameter Inference
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-13
    Sergey A. Anfinogentov, Valery M. Nakariakov, David J. Pascoe, and Christopher R. Goddard

    We present the Solar Bayesian Analysis Toolkit (SoBAT), which is a new easy to use tool for Bayesian analysis of observational data, including parameter inference and model comparison. SoBAT is aimed (but not limited) to be used for the analysis of solar observational data. We describe a new IDL code designed to facilitate the comparison of a user-supplied model with data. Bayesian inference allows

    更新日期:2021-01-13
  • powderday : Dust Radiative Transfer for Galaxy Simulations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-13
    Desika Narayanan, Matthew J. Turk, Thomas Robitaille, Ashley J. Kelly, B. Connor McClellan, Ray S Sharma, Prerak Garg, Matthew Abruzzo, Ena Choi, Charlie Conroy, Benjamin D. Johnson, Benjamin Kimock, Qi Li, Christopher C. Lovell, Sidney Lower, George C. Privon, Jonathan Roberts, Snigdaa Sethuram, Gregory F. Snyder, Robert Thompson, and John H. Wise

    We present powderday (available at https://github.com/dnarayanan/powderday [https://github.com/dnarayanan/powderday] ), a flexible, fast, open-source dust radiative transfer package designed to interface with both idealized and cosmological galaxy formation simulations. powderday builds on fsps stellar population synthesis models, and hyperion dust radiative transfer, and employs yt to interface between

    更新日期:2021-01-13
  • Analysis of Coronal Mass Ejection Flux Rope Signatures Using 3DCORE and Approximate Bayesian Computation
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-13
    Andreas J. Weiss, Christian Möstl, Tanja Amerstorfer, Rachel L. Bailey, Martin A. Reiss, Jürgen Hinterreiter, Ute A. Amerstorfer, and Maike Bauer

    We present a major update to the 3D coronal rope ejection (3DCORE) technique for modeling coronal mass ejection flux ropes in conjunction with an approximate Bayesian computation (ABC) algorithm that is used for fitting the model to in situ magnetic field measurements. The model assumes an empirically motivated torus-like flux rope structure that expands self-similarly within the heliosphere, is influenced

    更新日期:2021-01-13
  • Measuring the Metallicity of Early-type Galaxies. I. Composite Region
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2021-01-07
    Yu-Zhong Wu

    We present the data of 9739 early-type galaxies (ETGs), cross-matching Galaxy Zoo 1 with our sample selected from the catalog of the Sloan Digital Sky Survey Data Release 7 of MPA-JHU emission-line measurements. We first investigate the divisor between ETGs with and without star formation (SF), and find the best separator of W2–W3 = 2.0 is added. We explore the ETG sample by refusing a variety of ionization

    更新日期:2021-01-12
  • Proton and Hydrogen Transport through Hydrogen Environments: Ionization and Stripping
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-23
    N. D. Cariatore and D. R. Schultz

    Data are presented over a wide range of impact energies describing the ionization or stripping probability, projectile energy loss, and ejected electron and recoiling target energies and angles for proton and hydrogen passage through hydrogen astrophysical environments. These kinematic and reaction data are tabulated at three levels of detail for use in heavy-particle (H + , H) and secondary-electron

    更新日期:2020-12-24
  • Measuring Solar Differential Rotation with an Iterative Phase Correlation Method
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-23
    Zdeněk Hrazdíra, Miloslav Druckmüller, and Shadia Habbal

    A reliable inference of the differential rotation rate of the solar photosphere is essential for models of the solar interior. The work presented here is based on a novel iterative phase correlation technique, which relies on the measurement of the local shift, at the central meridian, between two images separated by a given time interval. Consequently, it does not require any specific reference features

    更新日期:2020-12-24
  • The NANOGrav 12.5 yr Data Set: Wideband Timing of 47 Millisecond Pulsars
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-21
    Md F. Alam, Zaven Arzoumanian, Paul T. Baker, Harsha Blumer, Keith E. Bohler, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Keeisi Caballero, Richard S. Camuccio, Rachel L. Chamberlain, Shami Chatterjee, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Justin A. Ellis, Robert D. Ferdman, Elizabeth C. Ferrara, William

    We present a new analysis of the profile data from the 47 millisecond pulsars comprising the 12.5 yr data set of the North American Nanohertz Observatory for Gravitational Waves, which is presented in a parallel paper (Alam et al., hereafter NG12.5). Our reprocessing is performed using “wideband” timing methods, which use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and

    更新日期:2020-12-22
  • The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-21
    Md F. Alam, Zaven Arzoumanian, Paul T. Baker, Harsha Blumer, Keith E. Bohler, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Keeisi Caballero, Richard S. Camuccio, Rachel L. Chamberlain, Shami Chatterjee, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Justin A. Ellis, Robert D. Ferdman, Elizabeth C. Ferrara, William

    We present time-of-arrival (TOA) measurements and timing models of 47 millisecond pulsars observed from 2004 to 2017 at the Arecibo Observatory and the Green Bank Telescope by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). The observing cadence was three to four weeks for most pulsars over most of this time span, with weekly observations of six sources. These data were

    更新日期:2020-12-22
  • OH Evolution in Molecular Clouds
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-17
    Ningyu Tang, Di Li, Nannan Yue, Pei Zuo, Tie Liu, Gan Luo, Longfei Chen, Sheng-Li Qin, Yuefang Wu, and Carl Heiles

    We have conducted a OH 18 cm survey toward 141 molecular clouds in various environments, including 33 optical dark clouds, 98 Planck Galactic cold clumps (PGCCs), and 10 Spitzer dark clouds with the Arecibo telescope. The deviations from local thermal equilibrium are common for intensity ratios of both OH main lines and satellite lines. Line intensity of OH 1667 MHz is found to correlate linearly with

    更新日期:2020-12-22
  • 591 High-velocity Stars in the Galactic Halo Selected from LAMOST DR7 and Gaia DR2
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-17
    Yin-Bi Li, A-Li Luo, You-Jun Lu, Xue-Sen Zhang, Jiao Li, Rui Wang, Fang Zuo, Maosheng Xiang, Yuan-Sen Ting, Tommaso Marchetti, Shuo Li, You-Fen Wang, Shuo Zhang, Kohei Hattori, Yong-Heng Zhao, Hua-Wei Zhang, and Gang Zhao

    In this paper, we report 591 high-velocity star candidates (HiVelSCs) selected from over 10 million spectra of Data Release 7 (DR7) of the Large Sky Area Multi-object Fiber Spectroscopic Telescope and the second Gaia data release, with three-dimensional velocities in the Galactic rest frame larger than 445 km s −1 . We show that at least 43 HiVelSCs are unbound to the Galaxy with escape probabilities

    更新日期:2020-12-22
  • Astromers: Nuclear Isomers in Astrophysics
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-17
    G. Wendell Misch, Surja K. Ghorui, Projjwal Banerjee, Yang Sun, and Matthew R. Mumpower

    We develop a method to compute thermally mediated transition rates between the ground state and long-lived isomers in nuclei. We also establish criteria delimiting a thermalization temperature above which a nucleus may be considered a single species and below which it must be treated as two separate species: a ground-state species and an astrophysical isomer (“astromer”) species. Below the thermalization

    更新日期:2020-12-22
  • Legolas: A Modern Tool for Magnetohydrodynamic Spectroscopy
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-10
    Niels Claes, Jordi De Jonghe, and Rony Keppens

    Magnetohydrodynamic (MHD) spectroscopy is central to many astrophysical disciplines, ranging from helio- to asteroseismology, over solar coronal (loop) seismology, to the study of waves and instabilities in jets, accretion disks, or solar/stellar atmospheres. MHD spectroscopy quantifies all linear (standing or traveling) wave modes, including overstable (i.e., growing) or damped modes, for a given

    更新日期:2020-12-13
  • The Wind beneath My Wings. I. Spectral Types and Multiplicity of the Central Stars Supporting Stellar Bow Shock Nebulae
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-10
    William T Chick, Henry A. Kobulnicky, Danielle P. Schurhammer, Julian E. Andrews, Matthew S. Povich, Elle R. Buser, Don M. Dixon, Michael J. Lindman, Stephan A. Munari, Grace M. Olivier, Rebecca L. Sorber, and Heather N. Wernke

    Arcuate mid-infrared nebulae known as stellar bow shock nebulae (SBNe) have been previously hypothesized to be supported by the strong stellar winds and/or luminosity of massive early-type stars. We present an optical spectroscopic survey of 84 stars identified from mid-infrared images as candidate SBN-supporting stars. Eighty-one of 84 sources, 96%, are O or early-B spectral types. K -band luminosities

    更新日期:2020-12-13
  • A Catalog of Broad Morphology of Pan-STARRS Galaxies Based on Deep Learning
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-10
    Hunter Goddard and Lior Shamir

    Autonomous digital sky surveys such as Pan-STARRS have the ability to image a very large number of galactic and extragalactic objects, and the large and complex nature of the image data reinforces the use of automation. Here we describe the design and implementation of a data analysis process for automatic broad morphology annotation of galaxies, and applied it to the data of Pan-STARRS DR1. The process

    更新日期:2020-12-13
  • LAMOST Observations in 15 K2 Campaigns. I. Low-resolution Spectra from LAMOST DR6
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-10
    Jiangtao Wang, Jian-Ning Fu, Weikai Zong, M. C. Smith, Peter De Cat, Jianrong Shi, Ali Luo, Haotong Zhang, A. Frasca, C. J. Corbally, J. Molenda-Żakowicz, G. Catanzaro, R. O. Gray, Jiaxin Wang, and Yang Pan

    The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST)-K2 (LK2) project, initiated in 2015, aims to collect low-resolution spectra of targets in the K2 campaigns, similar to the LAMOST-Kepler project. By the end of 2018, a total of 126 LK2 plates had been observed by LAMOST. After cross-matching the catalog of the LAMOST data release 6 (DR6) with that of the K2 approved targets, we

    更新日期:2020-12-13
  • CO Outflow Candidates toward the W3/4/5 Complex. II. Feedback from Candidate Outflows
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-10
    Yingjie Li, Ye Xu, Yan Sun, and Ji Yang

    To date, few studies have focused on protostellar outflow feedback at scales larger than several parsecs. To address this paucity of research, we investigate the effects of feedback from CO outflow candidates on their parent clouds over ∼110 deg 2 toward the W3/4/5 complex and its surroundings. Our search identified 265 13 CO clouds with radii being ∼0.04–17.12 pc. We estimate the turbulent support

    更新日期:2020-12-13
  • Measurements of the Hyperfine Structure of Atomic Energy Levels in Co ii
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-01
    Milan Ding and Juliet C. Pickering

    Analysis of hyperfine structure constants of singly ionized cobalt (Co II) were performed on cobalt spectra measured by Fourier transform spectrometers in the region 3000–63,000 cm −1 (33333 – 1587 Å). Fits to over 700 spectral lines led to measurements of 292 magnetic dipole hyperfine interaction A constants, with values between −32.5 mK and 59.5 mK (1 mK = 0.001 cm −1 ). Uncertainties of 255 A constants

    更新日期:2020-12-02
  • The K2 Galactic Archaeology Program Data Release 2: Asteroseismic Results from Campaigns 4, 6, and 7
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-01
    Joel C. Zinn, Dennis Stello, Yvonne Elsworth, Rafael A. García, Thomas Kallinger, Savita Mathur, Benoît Mosser, Lisa Bugnet, Caitlin Jones, Marc Hon, Sanjib Sharma, Ralph Schönrich, Jack T. Warfield, Rodrigo Luger, Marc H. Pinsonneault, Jennifer A. Johnson, Daniel Huber, Victor Silva Aguirre, William J. Chaplin, Guy R. Davies, and Andrea Miglio

    Studies of Galactic structure and evolution have benefited enormously from Gaia kinematic information, though additional, intrinsic stellar parameters like age are required to best constrain Galactic models. Asteroseismology is the most precise method of providing such information for field star populations en masse, but existing samples for the most part have been limited to a few narrow fields of

    更新日期:2020-12-02
  • The NASA Ames PAH IR Spectroscopic Database: The Laboratory Spectra
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-12-01
    A. L. Mattioda, D. M. Hudgins, C. Boersma, C. W. Bauschlicher Jr., A. Ricca, J. Cami, E. Peeters, F. Sánchez de Armas, G. Puerta Saborido, and L. J. Allamandola

    The astronomical emission features, formerly known as the unidentified infrared bands, are now commonly ascribed to polycyclic aromatic hydrocarbons (PAHs). The laboratory experiments and computational modeling performed at NASA Ames Research Center generated a collection of PAH IR spectra that have been used to test and refine the PAH model. These data have been assembled into the NASA Ames PAH IR

    更新日期:2020-12-02
  • FPFS Shear Estimator: Systematic Tests on the Hyper Suprime-Cam Survey First-year Data
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-23
    Xiangchong Li, Masamune Oguri, Nobuhiko Katayama, Wentao Luo, Wenting Wang, Jiaxin Han, Hironao Miyatake, Keigo Nakamura, and Surhud More

    We apply the Fourier Power Function Shapelets (FPFS) shear estimator to the first-year data of the Hyper Suprime-Cam survey to construct a shape catalog. The FPFS shear estimator has been demonstrated to have a multiplicative bias less than 1% in the absence of blending, regardless of complexities of galaxy shapes, smears of point spread functions (PSFs), and contamination from noise. The blending

    更新日期:2020-11-23
  • Dippers from the TESS Full-frame Images. I. Results of the First One Year Data and Discovery of a Runaway Dipper
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-23
    Tomoyuki Tajiri, Hajime Kawahara, Masataka Aizawa, Michiko S. Fujii, Kohei Hattori, Yui Kasagi, Takayuki Kotani, Kento Masuda, Munetake Momose, Takayuki Muto, Ryou Ohsawa, and Satoshi Takita

    We present a comprehensive catalog of the dippers—young stellar objects that exhibit episodic dimming—derived from one year’s worth of data of the Transiting Exoplanet Survey Satellite (TESS) full-frame images. In the survey, we found 35 dippers using the convolutional neural network, most of them newly discovered. Although these dippers are widely distributed over the first half-hemisphere that TESS

    更新日期:2020-11-23
  • Renormalization Group Analysis of the Turbulent Hydromagnetic Dynamo: The Effect of Nonstationarity
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-23
    Krzysztof A. Mizerski

    The turbulent hydromagnetic dynamo is a process of magnetic field generation by chaotic flow of an electrically conducting fluid (plasma, liquid iron, etc.). It is responsible for generation of large-scale magnetic fields of astrophysical objects such as planets, stars, accretion disks, galaxies, galaxy clusters, etc. In particular, the dynamical process of induction of large-scale fields by highly

    更新日期:2020-11-23
  • The Splashback Radius of Halos from Particle Dynamics. III. Halo Catalogs, Merger Trees, and Host–Subhalo Relations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-23
    Benedikt Diemer

    Virtually any investigation involving dark matter halos relies on a definition of their radius, of their mass, and of whether they are a subhalo. The halo boundary is most commonly defined to include a spherical overdensity contrast (such as ##IMG## [http://ej.iop.org/images/0067-0049/251/2/17/apjsabbf51ieqn1.gif] {${R}_{200{\rm{c}}}$} , ##IMG## [http://ej.iop.org/images/0067-0049/251/2/17/apjsabbf51ieqn2

    更新日期:2020-11-23
  • ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP). II. Survey Overview: A First Look at 1.3 mm Continuum Maps and Molecular Outflows
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-23
    Somnath Dutta, Chin-Fei Lee, Tie Liu, Naomi Hirano, Sheng-Yuan Liu, Ken’ichi Tatematsu, Kee-Tae Kim, Hsien Shang, Dipen Sahu, Gwanjeong Kim, Anthony Moraghan, Kai-Syun Jhan, Shih-Ying Hsu, Neal J. Evans, Doug Johnstone, Derek Ward-Thompson, Yi-Jehng Kuan, Chang Won Lee, Jeong-Eun Lee, Alessio Traficante, Mika Juvela, Charlotte Vastel, Qizhou Zhang, Patricio Sanhueza, Archana Soam, Woojin Kwon, Leonardo

    Planck Galactic Cold Clumps (PGCCs) are considered to be the ideal targets to probe the early phases of star formation. We have conducted a survey of 72 young dense cores inside PGCCs in the Orion complex with the Atacama Large Millimeter/submillimeter Array (ALMA) at 1.3 mm (band 6) using three different configurations (resolutions ∼0.″35, 1.″0, and 7.″0) to statistically investigate their evolutionary

    更新日期:2020-11-23
  • Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-12
    Weikai Zong, Jian-Ning Fu, Peter De Cat, Jiaxin Wang, Jianrong Shi, Ali Luo, Haotong Zhang, A. Frasca, J. Molenda-Żakowicz, R. O. Gray, C. J. Corbally, G. Catanzaro, Tianqi Cang, Jiangtao Wang, Jianjun Chen, Yonghui Hou, Jiaming Liu, Hubiao Niu, Yang Pan, Hao Tian, Hongliang Yan, Yong Zhang, and Heng Zuo

    Phase II of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)-Kepler/K2 survey (LK–MRS), initiated in 2018, aims at collecting medium-resolution spectra ( R ∼ 7500; hereafter MRS) for more than 50,000 stars with multiple visits (∼60 epochs) over a period of 5 yr (2018 September to 2023 June). We selected 20 footprints distributed across the Kepler field and six K2 campaigns, with

    更新日期:2020-11-13
  • Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-10
    Zhou Fan, Bingqiu Chen, Xiaoying Pang, Juanjuan Ren, Song Wang, Jing Wang, Kefeng Tan, Nan Song, Chun Li, Jie Zheng, and Gang Zhao

    Star clusters are good tracers for formation and evolution of galaxies. We compared different fitting methods by using spectra (or by combining photometry) to determine the physical parameters. We choose a sample of 17 star clusters in M33, which previously lacked spectroscopic observations. The low-resolution spectra were taken with the Xinglong 2.16 m reflector of NAOC. The photometry used in the

    更新日期:2020-11-12
  • CMZoom. II. Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way’s Central Molecular Zone
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-09
    H Perry Hatchfield, Cara Battersby, Eric Keto, Daniel Walker, Ashley Barnes, Daniel Callanan, Adam Ginsburg, Jonathan D. Henshaw, Jens Kauffmann, J. M. Diederik Kruijssen, Steve N. Longmore, Xing Lu, Elisabeth A. C. Mills, Thushara Pillai, Qizhou Zhang, John Bally, Natalie Butterfield, Yanett A. Contreras, Luis C. Ho, Jürgen Ott, Nimesh Patel, and Volker Tolls

    In this paper we present the CMZoom survey’s catalog of compact sources (<10″, ∼0.4 pc) within the central molecular zone (CMZ). CMZoom is a Submillimeter Array large program designed to provide a complete and unbiased map of all high column density gas ( N (H 2 ) ≥ 10 23 cm −2 ) of the innermost 500 pc of the Galaxy in the 1.3 mm dust continuum. We generate both a robust catalog designed to reduce

    更新日期:2020-11-09
  • Swift/UVOT+MaNGA (SwiM) Value-added Catalog
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-09
    Mallory Molina, Nikhil Ajgaonkar, Renbin Yan, Robin Ciardullo, Caryl Gronwall, Michael Eracleous, Xihan Ji, and Michael R. Blanton

    We introduce the Swift/UVOT+MaNGA (SwiM) value-added catalog, which comprises 150 galaxies that have both Sloan Digital Sky Survey (SDSS)/MaNGA integral field spectroscopy and archival Swift/UVOT near-UV (NUV) images. The similar angular resolution between the three Swift/UVOT NUV images and the MaNGA maps allows for a high-resolution comparison of optical and NUV indicators of star formation, crucial

    更新日期:2020-11-09
  • Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The C–D Band Strengths of Monodeuterated Species
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-09
    X. J. Yang, Aigen Li, and R. Glaser

    Deuterium (D) is one of the light elements created in the Big Bang. As the Galaxy evolves, the D/H abundance in the interstellar medium (ISM) decreases from its primordial value due to astration. However, the observed gas-phase D/H abundances of some sightlines in the local Galactic ISM are substantially lower than the expected reduction by astration. The missing D could have been depleted onto polycyclic

    更新日期:2020-11-09
  • Energy-preserving Integrators for Post-Newtonian Lagrangian Dynamics
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-02
    Li Huang and Lijie Mei

    Equations of motion derived from the Euler–Lagrange formula are usually implicit differential equations in terms of accelerations for the post-Newtonian (PN) Lagrangian dynamics of general relativistic problems. Meanwhile, the Legendre transform is in a nonclosed form due to the high nonlinearity of the velocity in the PN Lagrangian. To numerically integrate the exact implicit equations of motion rather

    更新日期:2020-11-02
  • FIRST Winged Radio Galaxies with X and Z Symmetry
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-02
    Soumen Bera, Sabyasachi Pal, Tapan K. Sasmal, and Soumen Mondal

    X-shaped radio galaxies (XRGs) are a subclass of radio sources that exhibit a pair of secondary low surface brightness radio lobes oriented at an angle to the primary high surface brightness lobes. Sometimes, the secondary low brightened lobes emerge from the edges of the primary high brightened lobes and form a Z-symmetric morphology. We present a systematical search result for XRGs and Z-shaped radio

    更新日期:2020-11-02
  • A Coupled Guiding Center–Boris Particle Pusher for Magnetized Plasmas in Compact-object Magnetospheres
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-11-02
    Fabio Bacchini, Bart Ripperda, Alexander A. Philippov, and Kyle Parfrey

    We present a novel numerical scheme for simulating the motion of relativistic charged particles in magnetospheres of compact objects, typically filled with highly magnetized collisionless plasmas. The new algorithm is based on a dynamic switch between the full system of equations of motion and a guiding-center approximation. The switch between the two formulations is based on the magnetization of the

    更新日期:2020-11-02
  • Pan-STARRS Photometric and Astrometric Calibration
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-30
    Eugene. A. Magnier, Edward. F. Schlafly, Douglas P. Finkbeiner, J. L. Tonry, B. Goldman, S. Röser, E. Schilbach, S. Casertano, K. C. Chambers, H. A. Flewelling, M. E. Huber, P. A. Price, W. E. Sweeney, C. Z. Waters, L. Denneau, P. W. Draper, K. W. Hodapp, R. Jedicke, N. Kaiser, R.-P. Kudritzki, N. Metcalfe, C. W. Stubbs, and R. J. Wainscoat

    We present the details of the photometric and astrometric calibration of the Pan-STARRS1 3 π Survey. The photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations onto a photometric system with consistent zero-points over the entire area surveyed, the ≈30,000 deg 2 north of δ = −30°. Using external comparisons, we demonstrate

    更新日期:2020-10-30
  • The Pan-STARRS Data-processing System
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-30
    Eugene A. Magnier, K. C. Chambers, H. A. Flewelling, J. C. Hoblitt, M. E. Huber, P. A. Price, W. E. Sweeney, C. Z. Waters, L. Denneau, P. W. Draper, K. W. Hodapp, R. Jedicke, N. Kaiser, R.-P. Kudritzki, N. Metcalfe, C. W. Stubbs, and R. J. Wainscoat

    The Pan-STARRS data-processing system is responsible for the steps needed to downloaded, archive, and process all images obtained by the Pan-STARRS telescopes, including real-time detection of transient sources such as supernovae and moving objects including potentially hazardous asteroids. With a nightly data volume of up to 4 TB and an archive of over 4 PB of raw imagery, Pan-STARRS is solidly in

    更新日期:2020-10-30
  • The Pan-STARRS1 Database and Data Products
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-30
    H. A. Flewelling, E. A. Magnier, K. C. Chambers, J. N. Heasley, C. Holmberg, M. E. Huber, W. Sweeney, C. Z. Waters, A. Calamida, S. Casertano, X. Chen, D. Farrow, G. Hasinger, R. Henderson, K. S. Long, N. Metcalfe, G. Narayan, M. A. Nieto-Santisteban, P. Norberg, A. Rest, R. P. Saglia, A. Szalay, A. R. Thakar, J. L. Tonry, J. Valenti, S. Werner, R. White, L. Denneau, P. W. Draper, K. W. Hodapp, R.

    This paper describes the organization of the database and the catalog data products from the Pan-STARRS1 3 π Steradian Survey. The catalog data products are available in the form of an SQL-based relational database from MAST, the Mikulski Archive for Space Telescopes at STScI. The database is described in detail, including the construction of the database, the provenance of the data, the schema, and

    更新日期:2020-10-30
  • Pan-STARRS Pixel Analysis: Source Detection and Characterization
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-30
    Eugene A. Magnier, W. E. Sweeney, K. C. Chambers, H. A. Flewelling, M. E. Huber, P. A. Price, C. Z. Waters, L. Denneau, P. W. Draper, D. Farrow, R. Jedicke, K. W. Hodapp, N. Kaiser, R.-P. Kudritzki, N. Metcalfe, C. W. Stubbs, and R. J. Wainscoat

    Over 3 billion astronomical sources have been detected in the more than 22 million orthogonal transfer CCD images obtained as part of the Pan-STARRS1 3 π survey. Over 85 billion instances of those sources have been automatically detected and characterized by the Pan-STARRS Image Processing Pipeline photometry software, psphot . This fast, automatic, and reliable software was developed for the Pan-STARRS

    更新日期:2020-10-30
  • Pan-STARRS Pixel Processing: Detrending, Warping, Stacking
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-30
    C. Z. Waters, E. A. Magnier, P. A. Price, K. C. Chambers, W. S. Burgett, P. W. Draper, H. A. Flewelling, K. W. Hodapp, M. E. Huber, R. Jedicke, N. Kaiser, R.-P. Kudritzki, R. H. Lupton, N. Metcalfe, A. Rest, W. E. Sweeney, J. L. Tonry, R. J. Wainscoat, and W. M. Wood-Vasey

    The Pan-STARRS1 (PS1) Science Consortium has carried out a set of imaging surveys using the 1.4 gigapixel GPC1 camera on the PS1 telescope. As this camera is composed of many individual electronic readouts and covers a very large field of view, great care was taken to ensure that the many instrumental effects were corrected to produce the most uniform detector response possible. We present the image-detrending

    更新日期:2020-10-30
  • The Chandra Deep Wide-field Survey: A New Chandra Legacy Survey in the Boötes Field. I. X-Ray Point Source Catalog, Number Counts, and Multiwavelength Counterparts
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-21
    Alberto Masini, Ryan C. Hickox, Christopher M. Carroll, James Aird, David M. Alexander, Roberto J. Assef, Richard Bower, Mark Brodwin, Michael J. I. Brown, Suchetana Chatterjee, Chien-Ting J. Chen, Arjun Dey, Michael A. DiPompeo, Kenneth J. Duncan, Peter R. M. Eisenhardt, William R. Forman, Anthony H. Gonzalez, Andrew D. Goulding, Kevin N. Hainline, Buell T. Jannuzi, Christine Jones, Christopher S

    We present a new, ambitious survey performed with the Chandra X-ray Observatory of the 9.3 deg 2 Boötes field of the NOAO Deep Wide-Field Survey. The wide field probes a statistically representative volume of the universe at high redshift. The Chandra Deep Wide-field Survey exploits the excellent sensitivity and angular resolution of Chandra over a wide area, combining 281 observations spanning 15

    更新日期:2020-10-30
  • A Broadband Digital Spectrometer for the Deep Space Network
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-21
    Kristen Virkler, Jonathon Kocz, Melissa Soriano, Shinji Horiuchi, Jorge L. Pineda, and Tyrone McNichols

    The Deep Space Network (DSN) enables NASA to communicate with its spacecraft in deep space. By virtue of its large antennas, the DSN can also be used as a powerful instrument for radio astronomy. Specifically, the Deep Space Station (DSS)-43, the 70 m antenna at the Canberra Deep Space Communications Complex (CDSCC), has a K -band radio astronomy system covering a 10 GHz bandwidth at 17–27 GHz. This

    更新日期:2020-10-30
  • ZBLLAC: A Spectroscopic Database of BL Lacertae Objects
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-14
    Marco Landoni, R. Falomo, S. Paiano, and A. Treves

    This paper describes the database of optical spectra of BL Lacertae (BLL) objects (Z BLL objects) available at https://web.oapd.inaf.it/zbllac/ [https://web.oapd.inaf.it/zbllac/] . At present, it contains calibrated spectra for 295 BLL. For about 35% of them, we report a firm measure of redshift z , while for 35 sources we set a lower limit on z based on the detection of intervening absorption systems

    更新日期:2020-10-16
  • The Sloan Digital Sky Survey Reverberation Mapping Project: the XMM-Newton X-Ray Source Catalog and Multiband Counterparts
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-08
    Teng Liu, Andrea Merloni, Torben Simm, Paul J. Green, William N. Brandt, Donald P. Schneider, Tom Dwelly, Mara Salvato, Johannes Buchner, Yue Shen, Kirpal Nandra, Antonis Georgakakis, and Luis C. Ho

    The XMM-RM project was designed to provide X-ray coverage of the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) field. Forty-one XMM-Newton exposures, placed surrounding the Chandra AEGIS field, were taken, covering an area of 6.13 deg 2 and reaching a nominal exposure depth of ∼15 ks. We present an X-ray catalog of 3553 sources detected in these data, using a PSF-fitting algorithm and a

    更新日期:2020-10-12
  • Matched Photometric Catalogs of GALEX UV Sources with Gaia DR2 and SDSS DR14 Databases (GUVmatch)
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-08
    Luciana Bianchi and Bernard Shiao

    We have matched the ultraviolet (UV) sources in GUVcat _AIS with optical databases that have similar depth and wide sky coverage. GUVcat _AIS has Galaxy Evolution Explorer (GALEX) far-UV (FUV, λ eff ∼ 1528 Å) and near-UV (NUV, λ eff ∼ 2310 Å) photometry of ≈83 million sources, covering 24,788 square degrees of the sky, with a typical depth of FUV = 19.9 and NUV = 20.8 AB mag. Matches with Gaia and

    更新日期:2020-10-12
  • Sub-ion Scale Compressive Turbulence in the Solar Wind: MMS Spacecraft Potential Observations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-08
    Owen Wyn Roberts, Rumi Nakamura, Klaus Torkar, Yasuhito Narita, Justin C. Holmes, Zoltán Vörös, Christoph Lhotka, C. Philippe Escoubet, Daniel B. Graham, Daniel J. Gershman, Yuri Khotyaintsev, and Per-Arne Lindqvist

    Compressive plasma turbulence is investigated at sub-ion scales in the solar wind using both the Fast Plasma Investigation (FPI) instrument on the Magnetospheric MultiScale mission (MMS), as well as using calibrated spacecraft potential data from the Spin Plane Double Probe (SDP) instrument. The data from FPI allow the sub-ion scale region ( f sc ≳ 1 Hz) to be investigated before the instrumental noise

    更新日期:2020-10-12
  • Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-08
    Kyle E. Conroy, Angela Kochoska, Daniel Hey, Herbert Pablo, Kelly M. Hambleton, David Jones, Joseph Giammarco, Michael Abdul-Masih, and Andrej Prša

    PHOEBE 2 is a Python package for modeling the observables of eclipsing star systems, but until now it has focused entirely on the forward model—that is, generating a synthetic model given fixed values of a large number of parameters describing the system and the observations. The inverse problem, obtaining orbital and stellar parameters given observational data, is more complicated and computationally

    更新日期:2020-10-12
  • Yonsei Evolutionary Population Synthesis (YEPS) Model. III. Surface Brightness Fluctuation of Normal and Helium-enhanced Simple Stellar Populations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-10-08
    Chul Chung, Suk-Jin Yoon, Hyejeon Cho, Sang-Yoon Lee, and Young-Wook Lee

    We present an evolutionary population synthesis model of the surface brightness fluctuation (SBF) for normal and He-enriched simple stellar populations (SSPs). While our SBF model for the normal He population agrees with other existing models, the He-rich population, containing hotter horizontal branch stars and brighter red clump stars than the normal He population, entails a substantial change in

    更新日期:2020-10-12
  • The Coronal Global Evolutionary Model: Using HMI Vector Magnetogram and Doppler Data to Determine Coronal Magnetic Field Evolution
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-30
    J. Todd Hoeksema, William P. Abbett, David J. Bercik, Mark C. M. Cheung, Marc L. DeRosa, George H. Fisher, Keiji Hayashi, Maria D. Kazachenko, Yang Liu, Erkka Lumme, Benjamin J. Lynch, Xudong Sun, and Brian T. Welsch

    The Coronal Global Evolutionary Model (CGEM) provides data-driven simulations of the magnetic field in the solar corona to better understand the build-up of magnetic energy that leads to eruptive events. The CGEM project has developed six capabilities. CGEM modules (1) prepare time series of full-disk vector magnetic field observations to (2) derive the changing electric field in the solar photosphere

    更新日期:2020-10-02
  • On Neural Architectures for Astronomical Time-series Classification with Application to Variable Stars
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-30
    Sara Jamal and Joshua S. Bloom

    Despite the utility of neural networks (NNs) for astronomical time-series classification, the proliferation of learning architectures applied to diverse data sets has thus far hampered a direct intercomparison of different approaches. Here we perform the first comprehensive study of variants of NN-based learning and inference for astronomical time series, aiming to provide the community with an overview

    更新日期:2020-10-02
  • Search for Nearby Earth Analogs .III. Detection of 10 New Planets, 3 Planet Candidates, and Confirmation of 3 Planets around 11 Nearby M Dwarfs
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-30
    Fabo Feng, Stephen A. Shectman, Matthew S. Clement, Steven S. Vogt, Mikko Tuomi, Johanna K. Teske, Jennifer Burt, Jeffrey D. Crane, Bradford Holden, Sharon Xuesong Wang, Ian B. Thompson, Matías R. Díaz, and R. Paul Butler

    Earth-sized planets in the habitable zones of M dwarfs are good candidates for the study of habitability and detection of biosignatures. To search for these planets, we analyze all available radial velocity data and apply four signal detection criteria to select the optimal candidates. We find 10 strong candidates satisfying these criteria and three weak candidates showing inconsistency over time due

    更新日期:2020-10-02
  • The 2017 September 6 Flare: Radio Bursts and Pulsations in the 22–5000 MHz Range and Associated Phenomena
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-30
    Marian Karlický and Ján Rybák

    For the 2017 September 6 flare (SOL2017-Sep-06T11:53) we present not only unusual radio bursts but also their interesting time association with the other flare phenomena observed in extreme ultraviolet (EUV), white-light, X-ray, and γ -ray emissions. Using our new method based on wavelets we found quasi-periodic pulsations (QPPs) in several locations of the whole time–frequency domain of the analyzed

    更新日期:2020-10-02
  • The Spectroscopic Follow-up of the QUBRICS Bright Quasar Survey
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-28
    Konstantina Boutsia, Andrea Grazian, Giorgio Calderone, Stefano Cristiani, Guido Cupani, Francesco Guarneri, Fabio Fontanot, Ricardo Amorin, Valentina D’Odorico, Emanuele Giallongo, Mara Salvato, Alessandro Omizzolo, Michael Romano, and Nicola Menci

    We present the results of the spectroscopic follow-up of the QUasars as BRIght beacons for Cosmology in the Southern Hemisphere (QUBRICS; Calderone et al. 2019) survey. The selection method is based on a machine-learning approach applied to photometric catalogs, covering an area of ∼12,400 deg 2 in the Southern Hemisphere. The spectroscopic observations started in 2018 and identified 55 new, high-redshift

    更新日期:2020-09-29
  • Inference of the Local Interstellar Spectra of Cosmic-Ray Nuclei Z ≤ 28 with the G al P rop –H el M od Framework
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-28
    M. J. Boschini, S. Della Torre, M. Gervasi, D. Grandi, G. Jóhannesson, G. La Vacca, N. Masi, I. V. Moskalenko, S. Pensotti, T. A. Porter, L. Quadrani, P. G. Rancoita, D. Rozza, and M. Tacconi

    Composition and spectra of Galactic cosmic rays (CRs) are vital for studies of high-energy processes in a variety of environments and on different scales, for interpretation of γ -ray and microwave observations, for disentangling possible signatures of new phenomena, and for understanding of our local Galactic neighborhood. Since its launch, AMS-02 has delivered outstanding-quality measurements of

    更新日期:2020-09-29
  • AstroSat UVIT Detections of Chandra X-Ray Sources in M31
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-15
    D. A. Leahy and Y. Chen

    An ultraviolet (UV) survey of M31 has been carried out during 2017–19 with the Ultra-Violet Imaging Telescope (UVIT) instrument on board the AstroSat Observatory. Here we match the M31 UVIT source catalog with the Chandra source catalog. We find 67 UVIT/Chandra sources detected in a varying number of UV and X-ray bands. The UV and X-ray photometry is analyzed using power-law and blackbody models. The

    更新日期:2020-09-16
  • A Search for Rotation Periods in 1000 TESS Objects of Interest
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-09
    B. L. Canto Martins, R. L. Gomes, Y. S. Messias, S. R. de Lira, I. C. Leão, L. A. Almeida, M. A. Teixeira, M. L. das Chagas, J. P. Bravo, A. Bewketu Belete, and J. R. De Medeiros

    The high-quality light curves from the Transiting Exoplanet Survey Satellite (TESS) represent a unique laboratory for the study of stellar rotation, which is a fundamental observable driving stellar and planetary evolution, including planetary atmospheres and impacting habitability conditions and the genesis of life around stars. As of 2020 April 14, this mission delivered public light curves for 1000

    更新日期:2020-09-10
  • Simulating the Cosmic Neutrino Background Using Collisionless Hydrodynamics
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-09
    Derek Inman and Hao-Ran Yu

    The cosmic neutrino background is an important component of the universe that is difficult to include in cosmological simulations due to the extremely large velocity dispersion of neutrino particles. We develop a new approach to simulate cosmic neutrinos that decomposes the Fermi–Dirac phase space into shells of constant speed and then evolves those shells using hydrodynamic equations. These collisionless

    更新日期:2020-09-10
  • ALMA High-frequency Long-baseline Campaign in 2017: A Comparison of the Band-to-band and In-band Phase Calibration Techniques and Phase-calibrator Separation Angles
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-09
    Luke T. Maud, Yoshiharu Asaki, Edward B. Fomalont, William R. F. Dent, Akihiko Hirota, Satoki Matsushita, Neil M. Phillips, John M. Carpenter, Satoko Takahashi, Eric Villard, Tsuyoshi Sawada, and Stuartt Corder

    The Atacama Large Millimeter/submillimeter Array (ALMA) obtains spatial resolutions of 15 to 5 mas at 275–950 GHz (0.87–0.32 mm) with 16 km baselines. Calibration at higher frequencies is challenging as ALMA sensitivity and quasar density decrease. The band-to-band (B2B) technique observes a detectable quasar at a lower frequency that is closer to the target, compared to one at the target high frequency

    更新日期:2020-09-10
  • Upgraded GMRT Observations of the Coma Cluster of Galaxies: The Observations
    Astrophys. J. Suppl. Ser. (IF 7.95) Pub Date : 2020-09-09
    Dharam V. Lal

    We have used the upgraded Giant Metrewave Radio Telescope to map the Coma cluster of galaxies at 250–500 MHz and 1050–1450 MHz bands. These 6.″26 and 2.″18 resolutions observations allow detailed radio structures to be determined of all detected radio sources that show both discrete pointlike and extended morphologies. We present images of a subset of 32 brightest ( S ν ≳ 30 mJy) and dominant sources

    更新日期:2020-09-10
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