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Estimation of the Lifetime of Slow-Decaying Unipolar Active Regions in the Framework of the Turbulent Erosion Model Sol. Phys. (IF 2.8) Pub Date : 2024-03-15
Abstract We explore the properties and behavior of slow-decaying unipolar sunspot groups in the framework of the turbulent erosion model suggested by Petrovay and Moreno-Insertis (Astrophys. J. 485, 398, 1997). The basic concept of the model is the suppression of turbulent diffusivity inside a magnetic flux tube by strong magnetic fields. As a result, the outer turbulent plasma detaches magnetic features
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Correlation Functions of Photospheric Magnetic Fields in Solar Active Regions Sol. Phys. (IF 2.8) Pub Date : 2024-03-12
Abstract We used magnetograms acquired with the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO) to calculate and analyze spatial correlation functions and the multifractal spectra in solar active regions (ARs). The analysis was performed for two very different types of ARs: i) simple bipolar magnetic structures with regular orientation (the magnetomorphological
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Multiwavelength Observations of Quasiperiodic Pulsations in the Impulsive Phase of an Eruptive Flare with the Hard X-Ray Imager On Board ASO-S and Other Instruments Sol. Phys. (IF 2.8) Pub Date : 2024-03-12 Fanpeng Shi, Dong Li, Zongjun Ning, Alexander Warmuth, Wei Chen, Yang Su, Ying Li, Jun Xu, Yuxiang Song, Yuzhi Yang
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Solar Flare Forecasting Based on Magnetogram Sequences Learning with Multiscale Vision Transformers and Data Augmentation Techniques Sol. Phys. (IF 2.8) Pub Date : 2024-03-12 Luís Fernando L. Grim, André Leon S. Gradvohl
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In Situ Observation of Alfvén Waves in an ICME Shock-Sheath Indicating the Existence of Alfvénic Turbulence Sol. Phys. (IF 2.8) Pub Date : 2024-03-06 Omkar Dhamane, Anil Raghav, Zubair Shaikh, Vinit Pawaskar, Kalpesh Ghag, Prathmesh Tari, Utsav Panchal
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Reconstruction of Carrington Rotation Means of Open Solar Flux over the Past 154 Years Sol. Phys. (IF 2.8) Pub Date : 2024-03-05 Mike Lockwood, Mat Owens
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The Polar Field Reversal Process over Five Solar Cycles Sol. Phys. (IF 2.8) Pub Date : 2024-03-05 D. F. Webb, B. A. Emery, S. E. Gibson, I. M. Hewins, R. H. McFadden, T. A. Kuchar
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Non-reflective Propagation of Kink Waves in Magnetic-Flux Tubes in the Solar Atmosphere Sol. Phys. (IF 2.8) Pub Date : 2024-03-01 M. S. Ruderman, N. S. Petrukhin
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Data-Driven Forecasting of Sunspot Cycles: Pros and Cons of a Hybrid Approach Sol. Phys. (IF 2.8) Pub Date : 2024-02-27 Qinglin Xu, Rekha Jain, Wei Xing
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Mancha3D Code: Multipurpose Advanced Nonideal MHD Code for High-Resolution Simulations in Astrophysics Sol. Phys. (IF 2.8) Pub Date : 2024-02-20
Abstract The Mancha3D code is a versatile tool for numerical simulations of magnetohydrodynamic (MHD) processes in solar/stellar atmospheres. The code includes nonideal physics derived from plasma partial ionization, a realistic equation of state and radiative transfer, which allows performing high-quality realistic simulations of magnetoconvection, as well as idealized simulations of particular processes
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Spectra and Anisotropy of Solar Energetic Protons During GLE #65 on 28 October, 2003 and GLE #66 on 29 October, 2003 Sol. Phys. (IF 2.8) Pub Date : 2024-02-20 Alexander L. Mishev, Sergey A. Koldobskiy, Nicholas Larsen, Ilya G. Usoskin
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The McNish and Lincoln Solar-Activity Predictions: The Method and Its Performance Sol. Phys. (IF 2.8) Pub Date : 2024-02-19 Frédéric Clette, Shantanu Jain, Tatiana Podladchikova
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A Discussion of Implausible Total Solar-Irradiance Variations Since 1700 Sol. Phys. (IF 2.8) Pub Date : 2024-02-15 Theodosios Chatzistergos
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Observing the Sun with the Atacama Large Millimeter/Submillimeter Array (ALMA): Polarization Observations at 3 mm Sol. Phys. (IF 2.8) Pub Date : 2024-02-12
Abstract The Atacama Large Millimeter/submillimeter Array (ALMA) is a general purpose telescope that performs a broad program of astrophysical observations. Beginning in late 2016, solar observations with ALMA became available, thereby opening a new window onto solar physics. Since then, the number of solar observing capabilities has increased substantially but polarimetric observations, a community
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Temporal and Periodic Analysis of Penumbra–Umbra Ratio for the Last Four Solar Cycles Sol. Phys. (IF 2.8) Pub Date : 2024-02-12 Partha Chowdhury, Ali Kilcik, Ankit Saha, Jean-Pierre Rozelot, Vladimir Obridko, Robertus Erdélyi
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Localization of the Gamma-Ray Emission Region in the 1 September 2014 Behind-the-Limb Solar Flare According to the Fermi/LAT Data Sol. Phys. (IF 2.8) Pub Date : 2024-02-12
Abstract Since the launch of the Fermi mission in 2008, it has become possible to study high-energy solar \(\gamma\) -rays with an unprecedented imaging capability. In particular, the position of the \(>100\text{ MeV}\) \(\gamma\) -ray source can shed light on the origin of high-energy protons that is still controversial. However, the imaging of solar \(\gamma\) -ray sources with the Fermi Large Area
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Comparison of Line-of-Sight Magnetic Field Observed by ASO-S/FMG, SDO/HMI and HSOS/SMAT Sol. Phys. (IF 2.8) Pub Date : 2024-02-09
Abstract The Full-disk MagnetoGraph (FMG) onboard the Advanced Space based Solar Observatory has obtained a series of line-of-sight magnetic-field measurements since its launch in October 2022. It is important to compare its observational data with other existing solar telescopes. In this paper, we make a detailed comparison of four active regions and a pore region simultaneously observed by FMG, the
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The Instantaneous Response of the Geomagnetic Field, Near-Earth IMF, and Cosmic-Ray Intensity to Solar Flares Sol. Phys. (IF 2.8) Pub Date : 2024-02-09 Jouni Takalo
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Study of Reconnection Dynamics and Plasma Relaxation in MHD Simulation of a Solar Flare Sol. Phys. (IF 2.8) Pub Date : 2024-02-05 Satyam Agarwal, Ramit Bhattacharyya, Shangbin Yang
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An Interesting Correlation Between the Peak Slope and Peak Value of a Sunspot Cycle Sol. Phys. (IF 2.8) Pub Date : 2024-02-05
Abstract The maximum slope of the sunspot number during the rising phase of a sunspot cycle has an excellent correlation with the maximum value of the sunspot number during that cycle. This is demonstrated using a Savitzky–Golay filter to both smooth and calculate the derivative of the sunspot-number data. Version 2 of the International Sunspot Number ( \(S\) ) is used to represent solar activity.
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Energy Definition and Minimization in Avalanche Models for Solar Flares Sol. Phys. (IF 2.8) Pub Date : 2024-02-02
Abstract Self-organized critical avalanche models are a class of cellular automata that, despite their simplicity, can be applied to the modeling of solar (and stellar) flares and generate robust power-law distributions in event size measures. However, bridging the conceptual gap to both magnetohydrodynamics and real flare observations continues to prove challenging. In this paper, we focus on a specific
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On the Correlation of Cosmic-Ray Intensity with Solar Activity and Interplanetary Parameters Sol. Phys. (IF 2.8) Pub Date : 2024-01-24
Abstract We investigated correlations between cosmic-ray intensity and 14 solar and interplanetary parameters, which were classified into four cases. We used the modulation of cosmic-ray intensity observed at six distinct stations with different latitudes and cut-off rigidities. We used the partial least-squares (PLS) method to rank the parameters. In the first case, we employed 11 parameters without
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Sunspots Identification Through Mathematical Morphology Sol. Phys. (IF 2.8) Pub Date : 2024-01-23 Slava Bourgeois, Teresa Barata, Robertus Erdélyi, Ricardo Gafeira, Orlando Oliveira
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A Statistical Study of Solar White-Light Flares Observed by the White-Light Solar Telescope of the Lyman-Alpha Solar Telescope on the Advanced Space-Based Solar Observatory (ASO-S/LST/WST) at 360 nm Sol. Phys. (IF 2.8) Pub Date : 2024-01-23 Zhichen Jing, Ying Li, Li Feng, Hui Li, Yu Huang, Youping Li, Yang Su, Wei Chen, Jun Tian, Dechao Song, Jingwei Li, Jianchao Xue, Jie Zhao, Lei Lu, Beili Ying, Ping Zhang, Yingna Su, Qingmin Zhang, Dong Li, Yunyi Ge, Shuting Li, Qiao Li, Gen Li, Xiaofeng Liu, Guanglu Shi, Jiahui Shan, Zhengyuan Tian, Yue Zhou, Weiqun Gan
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Velocity Oscillations in CME and Related Shock: A Comparative Analysis Sol. Phys. (IF 2.8) Pub Date : 2024-01-22 V. G. Fainshtein, Y. I. Egorov
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Solar Flare Catalogue from 3 Years of Chandrayaan-2 XSM Observations Sol. Phys. (IF 2.8) Pub Date : 2024-01-22 Aravind Bharathi Valluvan, Ashwin Goyal, Devansh Jain, Abhinna Sundar Samantaray, Abhilash Sarwade, Kasiviswanathan Sankarasubramanian
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Two New Sub-GLEs Found in Data of Neutron Monitors at South Pole and Vostok: On 09 June 1968 and 27 February 1969 Sol. Phys. (IF 2.8) Pub Date : 2024-01-19
Abstract Intense solar energetic particle (SEP) events can be observed by neutron monitors (NMs) as so-called ground-level enhancements (GLEs). High-altitude polar NMs have high sensitivity for SEP due to the reduced atmospheric energy cutoff and very low geomagnetic rigidity cutoff compared to other NMs. There is a special class of sub-GLE events, viz. events that are weaker than standard GLEs and
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Magnetic Configuration of Active Regions Associated with GLE Events Sol. Phys. (IF 2.8) Pub Date : 2024-01-19 Regina A. Suleymanova, Leonty I. Miroshnichenko, Valentina I. Abramenko
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Solar Energetic Particles and Intensity of Metric Type II Radio Bursts Sol. Phys. (IF 2.8) Pub Date : 2024-01-11 Yuriy T. Tsap, Elena A. Isaeva, Yulia G. Kopylova
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Reconstructing Sunspot Number by Forward-Modelling Open Solar Flux Sol. Phys. (IF 2.8) Pub Date : 2024-01-09 Mathew J. Owens, Mike Lockwood, Luke A. Barnard, Ilya Usoskin, Hisashi Hayakawa, Benjamin J. S. Pope, Ken McCracken
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Statistical Properties of Magnetic Bright Points at Different Latitudes and Longitudes of the Sun Sol. Phys. (IF 2.8) Pub Date : 2024-01-02 Limin Zhao, Peng Yang, Haicheng Bai, Xiaoying Gong, Meng Sang, Yukuan Zhang, Yang Yang
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Slow Magnetoacoustic Waves in Smoothly Nonuniform Coronal Plasma Structures Sol. Phys. (IF 2.8) Pub Date : 2024-01-03 Viktor V. Fedenev, Valery M. Nakariakov, Sergey A. Anfinogentov
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A Survey and Statistical Study of Off-Limb Events Observed in SDO/HMI Continuum Intensity Sol. Phys. (IF 2.8) Pub Date : 2023-12-22 Jessica S. Zhao, Yang Liu
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Near-Surface Azimuthal Magnetic Fields and Their Role in Solar Activity Cycles Sol. Phys. (IF 2.8) Pub Date : 2023-12-22 Andrey G. Tlatov
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The Fibre Resolved OpticAl and Near-Ultraviolet Czerny–Turner Imaging Spectropolarimeter (francis) Sol. Phys. (IF 2.8) Pub Date : 2023-12-20 David B. Jess, Samuel D. T. Grant, William Bate, Jiajia Liu, Shahin Jafarzadeh, Peter H. Keys, Luís E. A. Vieira, Alisson Dal Lago, Fernando L. Guarnieri, Damian J. Christian, Doug Gilliam, Dipankar Banerjee
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Causal Analysis of Influence of the Solar Cycle and Latitudinal Solar-Wind Structure on Co-Rotation Forecasts Sol. Phys. (IF 2.8) Pub Date : 2023-12-13 Nachiketa Chakraborty, Harriet Turner, Mathew Owens, Matthew Lang
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Kilometric Type II Radio Emissions in Wind/WAVES TNR Data and Association with Interplanetary Structures Near Earth Sol. Phys. (IF 2.8) Pub Date : 2023-12-14 Franco Manini, Hebe Cremades, Fernando M. López, Teresa Nieves-Chinchilla
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Magnetic Properties of Source Regions of CMEs and DH Type II Radio Bursts Sol. Phys. (IF 2.8) Pub Date : 2023-12-14 P. Vijayalakshmi, A. Shanmugaraju, S. Aswin Amirtha Raj
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Derived Electron Densities from Linear Polarization Observations of the Visible-Light Corona During the 14 December 2020 Total Solar Eclipse Sol. Phys. (IF 2.8) Pub Date : 2023-12-05 Liam Edwards, Kaine A. Bunting, Brad Ramsey, Matthew Gunn, Tomos Fearn, Thomas Knight, Gabriel Domingo Muro, Huw Morgan
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The Magnetic-Field Calibration of the Full-Disk Magnetograph Onboard the Advanced Space Based Solar Observatory (ASO-S/FMG) Sol. Phys. (IF 2.8) Pub Date : 2023-12-06 S. Liu, J. T. Su, X. Y. Bai, Y. Y. Deng, J. Chen, Y. L. Song, X. F. Wang, H. Q. Xu, X. Yang
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Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph Sol. Phys. (IF 2.8) Pub Date : 2023-11-28 Feiyang Sha, Yu Liu, Xuefei Zhang, Tengfei Song
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Comparison of I-ICME and M-ICME Fittings and In Situ Observation Parameters for Solar Cycles 23 and 24 and Their Influence on Geoeffectiveness Sol. Phys. (IF 2.8) Pub Date : 2023-11-27 Zhiyong Zhang, Chenglong Shen, Yutian Chi, Dongwei Mao, Junyan Liu, Mengjiao Xu, Zhihui Zhong, Can Wang, Yuming Wang
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Solar Flare Prediction and Feature Selection Using a Light-Gradient-Boosting Machine Algorithm Sol. Phys. (IF 2.8) Pub Date : 2023-11-23 P. A. Vysakh, Prateek Mayank
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Tomographic Reconstruction of the Solar K-Corona Using Neural Fields Sol. Phys. (IF 2.8) Pub Date : 2023-11-20 Andrés Asensio Ramos
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Chromospheric Evaporation by Particle Beams in Multi-Dimensional Flare Models Sol. Phys. (IF 2.8) Pub Date : 2023-11-20 Malcolm Keith Druett, Wenzhi Ruan, Rony Keppens
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Separating He ii and Si xi Emission Components in Off-limb 304 Å Observations Sol. Phys. (IF 2.8) Pub Date : 2023-11-22 Ivan Loboda, Anton Reva, Sergey Bogachev, Alexey Kirichenko, Artem Ulyanov
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Quantifying the Consistency and Characterizing the Confidence of Coronal Holes Detected by Active Contours Without Edges (ACWE) Sol. Phys. (IF 2.8) Pub Date : 2023-11-20 Jeremy A. Grajeda, Laura E. Boucheron, Michael S. Kirk, Andrew Leisner, C. Nick Arge
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Comparison of Solar Activity Parameters and Associated Forbush Decreases in Solar Cycles 23 and 24 Sol. Phys. (IF 2.8) Pub Date : 2023-11-17 Beena Bhatt, Harish Chandra
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The Mean Temperatures of CME-Related Dimming Masses Sol. Phys. (IF 2.8) Pub Date : 2023-11-16 Emily Thomson, Hugh Hudson
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Small-Scale Upflows in a Coronal Hole – Tracked from the Photosphere to the Corona Sol. Phys. (IF 2.8) Pub Date : 2023-11-10 Conrad Schwanitz, Louise Harra, Krzysztof Barczynski, Cristina H. Mandrini, David Orozco Suárez, Alejandro Moreno Vacas, Nour E. Raouafi
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Velocity and Dissipation Characteristics of Turbulence in Solar-Flare Plasma: An Application of Stochastic Lagrangian Models Sol. Phys. (IF 2.8) Pub Date : 2023-11-08 Pramod Kumar, R. K. Choudhary
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East–West Asymmetry in Interplanetary-Scintillation-Level Variation Associated with Solar-Wind Disturbances Sol. Phys. (IF 2.8) Pub Date : 2023-11-06 Munetoshi Tokumaru, Miho Nagai, Ken’ichi Fujiki, Kazumasa Iwai
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The Sun’s Alfvén Surface: Recent Insights and Prospects for the Polarimeter to Unify the Corona and Heliosphere (PUNCH) Sol. Phys. (IF 2.8) Pub Date : 2023-11-06 Steven R. Cranmer, Rohit Chhiber, Chris R. Gilly, Iver H. Cairns, Robin C. Colaninno, David J. McComas, Nour E. Raouafi, Arcadi V. Usmanov, Sarah E. Gibson, Craig E. DeForest
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Kink Waves in Twisted and Expanding Magnetic Tubes Sol. Phys. (IF 2.8) Pub Date : 2023-11-03 M. S. Ruderman, N. S. Petrukhin
We study kink and fluting waves in expanding and twisted magnetic flux tubes. We use the thin-tube and zero-beta plasma approximations. The equilibrium magnetic field is force free with a constant proportionality coefficient between the electrical current and the magnetic field. We derive the equation governing the kink and fluting waves in a tube. Using this equation we study the propagation of kink
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Solar X-Band Imaging with the Arecibo 12-m Telescope: The Brightness Temperature and Magnetic Field of Active Regions Sol. Phys. (IF 2.8) Pub Date : 2023-11-03 Periasamy K. Manoharan, Christopher J. Salter, Stephen M. White, Phil Perillat, Felix Fernandez, Ben Perera, Arun Venkataraman, Christiano M. Brum
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Photospheric Velocities Measured at Mt. Wilson Show Rotational and Poleward Velocity Deviations Compose the Torsional Oscillations Sol. Phys. (IF 2.8) Pub Date : 2023-10-25 Roger K. Ulrich, Tham Tran, John E. Boyden
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Bošković’s Method for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777 Sol. Phys. (IF 2.8) Pub Date : 2023-10-18 Mirko Husak, Roman Brajša, Dragan Špoljarić, Davor Krajnović, Domagoj Ruždjak, Ivica Skokić, Dragan Roša, Damir Hržina
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Stacked 1D Convolutional LSTM (sConvLSTM1D) Model for Effective Prediction of Sunspot Time Series Sol. Phys. (IF 2.8) Pub Date : 2023-10-17 Abhijeet Kumar, Vipin Kumar
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Average Subsurface Flows of Active and Quiet Regions with Large-Tile Ring-Diagram Analysis Sol. Phys. (IF 2.8) Pub Date : 2023-10-10 R. Komm