151 citations · 461 across the 20 of their papers we have counts for
20 papers
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…
Microwave response to sunspot oscillations
Robert Sych, Alexander Altyntsev
We present the first observations of spatially resolved oscillation sources obtained with the Siberian Radioheliograph (SRH) at 3-6 GHz. We have found significant flux oscillations…
Magneto-Acoustic Waves in Magnetic Twisted Flux Tube
Wei Wu, Robert Sych, Jie Chen +1
At present, many works about magneto-hydrodynamics wave diagnostics in magnetic flux tubes are based on some pioneer works not considering the contributions of magnetic twist. Othe…
The dynamics of 3-minute wavefronts and their relation to sunspot magnetic fields
Robert Sych, David B. Jess, Jiangtao Su
We present a study of wave processes occurring in solar active region NOAA 11131 on 2010 December 10, captured by the Solar Dynamics Observatory in the 1600A, 304A, and 171A channe…
Radio, EUV, and X-Ray Observations During a Filament Rise in the 2011 June 7 Solar Flare
Marian Karlicky, Jana Kasparova, Robert Sych
The most energetic flares start with a filament rise followed by magnetic reconnection below this filament. The start of the reconnection corresponds to the beginning of the flare…
Properties of local oscillations in the lower sunspot atmosphere
Robert Sych, Yuzef Zhugzhda, Xiaoli Yan
We present a study of wave processes in the sunspot region NOAA 12670 on 2017 August 10 observed by the Goode Solar Telescope in the TiO 7057 A and Ha 6563 A spectral lines. To stu…
A Model of Zebra Patterns in Solar Radio Emission
G. P. Chernov, V. V. Fomichev, R. A. Sych
We analyze complex zebra patterns and fiber bursts during type-IV solar radio bursts on August 1, 2010. It was shown that all of the main details of sporadic zebra patterns can be…
Local sunspot oscillations and umbral dots
Y. Zhugzhda, R. Sych
Data analysis of sunspot oscillation based on 6-hr SDO run of observation showed that low frequency (0.2 < ! < 1 mHz) oscillations are local similar to three and five minute oscill…
Fine wave dynamics in umbral flash sources
R. Sych, M. Wang
Umbral flashes (UFs) are most common phenomenon of wave processes in sunspots. Studying the relationship between wave time dynamics and the origin of UFs requires further investiga…
Comparison of alternative zebra-structure models in solar radio emission
G. P. Chernov, V. V. Fomichev, R. A. Sych
Discussion about the nature of zebra-structure (ZS) in the type IV radio bursts continues, despite the ten proposed models. First of all, this is due to the wide variety of stripes…
Flare processes evolution and polarization changes of fine structures of solar radio emission in the April 11, 2013 event
Gennady Chernov, Robert Sych, Baolin Tan +5
The measurement of positions and sizes of radio sources in the observations of solar radio spectral fine structures in an M6.5 flare on April 11, 2013 were observed simultaneously…
MHD waves in sunspots
Robert Sych
The review addresses the spatial frequency morphology of sources of sunspot oscillations and waves, including their localization, size, oscillation periods, height localization wit…
Study of multi-periodic coronal pulsations during an X-class solar flare
Partha Chowdhury, A. K. Srivastava, B. N. Dwivedi +2
We investigate quasi-periodic coronal pulsations during the decay phase of an X 3.2 class flare on 14 May 2013, using soft X-ray data from the RHESSI satellite. Periodogram analyse…
Wave dynamics in a sunspot umbra
R. Sych, V. M. Nakariakov
The high spatial and time resolution data obtained with SDO/AIA for the sunspot in active region NOAA 11131 on 08 December 2010 were analysed with the time-distance plot technique…
Microwave Zebra Pattern Structures in the X2.2 Solar Flare on Feb 15, 2011
Baolin Tan, Yihua Yan, Chengming Tan +2
Zebra pattern structure (ZP) is the most intriguing fine structure on the dynamic spectrograph of solar microwave burst. On 15 February 2011, there erupts an X2.2 flare event on th…
Induced MHD oscillations of fine loop structures located in coronal hole
S. Anfinogentov, R. Sych, D. Prosovetsky
Many phenomena seen in solar atmosphere are connected with underphotospheric processes. MHD oscillation and other dynamical processes observed in quit sun objects are, for example,…
Oscillatory processes in solar flares
V. M. Nakariakov, A. R. Inglis, I. V. Zimovets +4
Electromagnetic (radio, visible-light, UV, EUV, X-ray and gamma-ray) emission generated by solar and stellar flares often contains pronounced quasi-periodic pulsations (QPP). Physi…
Relationship between wave processes in sunspots and quasi-periodic pulsations in active region flares
R. Sych, V. M. Nakariakov, M. Karlicky +1
A phenomenological relationship between oscillations in a sunspot and quasi-periodic pulsations in flaring energy releases at an active region above the sunspot, is established. Th…
Web-Based Data Processing System for Automated Detection of Oscillations with Applications to the Solar Atmosphere
R. A. Sych, V. M. Nakariakov, S. Anfinogentov +1
A web-based, interactive system for the remote processing of imaging data sets (i.e., EUV, X-ray and microwave) and the automated interactive detection of wave and oscillatory phen…
Electron acceleration in a post-flare decimetric continuum source
Prasad Subramanian, S. M. White, M. Karlický +3
Aims: To calculate the power budget for electron acceleration and the efficiency of the plasma emission mechanism in a post-flare decimetric continuum source. Methods: We have imag…