151 citations · 928 across the 33 of their papers we have counts for
33 papers
Dual-Perspective Microwave and Hard X-ray Constraints of Asymmetric Nonthermal Loops in an X-class Flare
Ruifei Huang, Yao Chen, Victor Melnikov +9
We report dual-perspective microwave and HXR observations of an X-class flare on 2024 May 15, taking advantage of the unique geometry of a front-side view from the Earth and a back…
Electron Acceleration and Plasma Heating in an Impulsive Confined C-class Solar Flare
I. N. Sharykin, I. V. Zimovets, G. V. Koynash +3
A detailed analysis of the impulsive C2.8 solar flare SOL2023-03-19T02:12 is presented, focusing on the microwave (MW) and X-ray domains. The flare was selected because of its impu…
On the possibility of using decayless kink oscillations of coronal loops to forecast powerful solar flares and coronal mass ejections
A. B. Nechaeva, I. V. Zimovets, I. N. Sharykin +1
This work investigates the decayless kink oscillations of solar coronal loops and examines possible changes in their behaviour in active regions (ARs) before powerful solar flares…
Magneto-Thermal Coupling and Coronal Heating in Solar Active Regions Inferred from Microwave Observations
Alexey A. Kuznetsov, Gregory D. Fleishman, Gelu M. Nita +1
The solar corona is much hotter than the photosphere and chromosphere, but the physical mechanism responsible for heating the coronal plasma remains unidentified yet. The thermal m…
Electron acceleration and transport in the 2023-03-06 solar flare
Alexey Kuznetsov, Zhao Wu, Sergey Anfinogentov +2
We investigated in detail the M5.8 class solar flare that occurred on 2023-03-06. This flare was one of the first strong flares observed by the Siberian Radioheliograph in the micr…
A Multi-Peak Solar Flare with a High Turnover Frequency of The Gyrosynchrotron Spectra from the Loop-Top Source
Zhao Wu, Alexey Kuznetsov, Sergey Anfinogentov +8
The origin of multiple peaks in lightcurves of various wavelengths remains illusive during flares. Here we discuss the flare of SOL2023-05-09T03:54M6.5 with six flux peaks as recor…
Strongest coronal magnetic fields in solar cycles 23-24: probing, statistics, and implications
V. V. Fedenev, S. A. Anfinogentov, G. D. Fleishman
Strong coronal magnetic field, when present, manifests itself as bright microwave sources at high frequencies produced by gyroresonant (GR) emission mechanism in thermal coronal pl…
Data-Constrained Solar Modeling with GX Simulator
Gelu M. Nita, Gregory D. Fleishman, Alexey A. Kuznetsov +6
To facilitate the study of solar active regions and flaring loops, we have created a modeling framework, the freely distributed GX Simulator IDL package, that combines 3D magnetic…
Inter-Correlation Between Sunspot Oscillations and Their Internal Structures
Libo Fu, Zizhan Zhu, Ding Yuan +3
Three- and five-minute oscillations are commonly found in any sunspot. As they are modulated by the internal thermal and magnetic structures of a sunspot, therehence, they could be…
Novel data analysis techniques in coronal seismology
Sergey A. Anfinogentov, Patrick Antolin, Andrew R. Inglis +7
We review novel data analysis techniques developed or adapted for the field of coronal seismology. We focus on methods from the last ten years that were developed for extreme ultra…
Kink oscillations of coronal loops
V. M. Nakariakov, S. A. Anfinogentov, P. Antolin +13
Kink oscillations of coronal loops, i.e., standing kink waves, is one of the most studied dynamic phenomena in the solar corona. The oscillations are excited by impulsive energy re…
Light Bridges Can Suppress the Formation of Coronal Loops
Yuhu Miao, Libo Fu, Xian Du +5
A light bridge is a magnetic intrusion into a sunspot, it interacts with the main magnetic field and excites a variety of dynamical processes. In the letter, we studied magnetic co…
Diagnosing a Solar Flaring Core with Bidirectional Quasi-Periodic Fast Propagating Magnetoacoustic Waves
Yuhu Miao, Dong Li, Ding Yuan +4
Quasi-periodic fast propagating (QFP) waves are often excited by solar flares, and could be trapped in the coronal structure with low Alfvén speed, so they could be used as a diagn…
Coronal Heating Law Constrained by Microwave Gyroresonant Emission
Gregory D. Fleishman, Sergey A. Anfinogentov, Alexey G. Stupishin +2
The question why the solar corona is much hotter than the visible solar surface still puzzles solar researchers. Most theories of the coronal heating involve a tight coupling betwe…
Solar Bayesian Analysis Toolkit -- a new Markov chain Monte Carlo IDL code for Bayesian parameter inference
Sergey A. Anfinogentov, Valery M. Nakariakov, David J. Pascoe +1
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 comparis…
Observations of a quasi-periodic pulsation in the coronal loop and microwave flux during a solar preflare phase
Dong Li, Ying Li, Lei Lu +3
We report a quasi-periodic pulsation (QPP) event simultaneously detected from the spatial displacements of coronal loop at both EUV images and microwave emission during the preflar…
Magnetohydrodynamic Seismology of Quiet Solar Active Regions
Sergey A. Anfinogentov, Valery. M. Nakariakov
The ubiquity of recently discovered low-amplitude decayless kink oscillations of plasma loops allows for the seismological probing of the corona on a regular basis. In particular,…
Record-breaking coronal magnetic field in solar active region 12673
Sergey A. Anfinogentov, Alexey G. Stupishin, Ivan I. Mysh'yakov +1
At the Sun, the strongest magnetic fields are routinely detected at dark sunspots. The magnitude of the field is typically about 3000 G, with only a few exceptions that reported th…
Gamma-ray emission from the impulsive phase of the 2017 September 06 X9.3 flare
Alexandra L. Lysenko, Sergey A. Anfinogentov, Dmitry D. Svinkin +2
We report hard X-ray and gamma-ray observations of the impulsive phase of the SOL2017-09-06T11:55 X9.3 solar flare. We focus on a high-energy part of the spectrum, >100 keV, and pe…
Force-Free Field Reconstructions Enhanced by Chromospheric Magnetic Field Data
Gregory Fleishman, Ivan Mysh'yakov, Alexey Stupishin +2
3D picture of the coronal magnetic field remains an outstanding problem in solar physics, particularly, in active regions. Nonlinear force-free field reconstructions that employ ro…
Probing the Sunspot Atmosphere with Three-Minute Oscillations
A. S. Deres, S. A. Anfinogentov
We present a seismological method to probe the solar atmosphere above sunspot umbrae with three-minute oscillations. Our technique allows us to estimate both the vertical distance…
Algorithms of the Potential Field Calculation in a Three Dimensional Box
G. V. Rudenko, S. A. Anfinogentov
Calculation of the potential field inside a three-dimensional box with the normal magnetic field component given on all boundaries is needed for estimation of important quantities…
Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. Part III: Twist Number Method
Y. Guo, E. Pariat, G. Valori +7
We study the writhe, twist and magnetic helicity of different magnetic flux ropes, based on models of the solar coronal magnetic field structure. These include an analytical force-…
Casting the Coronal Magnetic Field Reconstruction Tools in 3D Using MHD Bifrost Model
Gregory D. Fleishman, Sergey Anfinogentov, Maria Loukitcheva +2
Quantifying coronal magnetic field remains a central problem in solar physics. Nowadays the coronal magnetic field is often modelled using nonlinear force-free field (NLFFF) recons…