18 citations · 25 across the 15 of their papers we have counts for
15 papers
The Study of Quasi-Periodic Pulsations in Solar and Stellar Flares with SKA
Valery M. Nakariakov, Atul Mohan, Vishal Upendran +5
An intensively studied phenomenon which is not described by the standard flare model are quasi-periodic pulsations (QPP) of the flaring emission. As analysis of the QPP phenomenon…
Decay Length of Slow Magnetoacoustic Waves in the Solar Corona using SDO/AIA and SolO/EUI
R. L. Meadowcroft, N. Narang, D. Berghmans +2
Slow magnetoacoustic waves have been observed in the solar corona for decades; yet, existing theories do not fully explain the wide range of observed decay lengths, and measurement…
A universal scaling between damping time and period of quasi-periodic pulsations from solar EUV brightenings to X-ray stellar flares
Daye Lim, Tom Van Doorsselaere, Valery M. Nakariakov +5
Recent high spatial and temporal resolution extreme-ultraviolet (EUV) imaging observations have revealed that quasi-periodic pulsations (QPPs), a ubiquitous signature of impulsive…
Phase-drifting with emitting plasma temperature in the quasi-periodic pulsations of an X-class solar flare
Libo Fu, Valery M. Nakariakov, Ding Yuan +3
Recent multi-wavelength observations of solar flares have provided new constraints on the physical origin of quasi-periodic pulsations (QPPs). In an X-class flare, we detect a shor…
Effect of Solar Flares on Decayless Kink Oscillations in Nearby Coronal Loops
Zhiyi Li, Valery M. Nakariakov, Ding Yuan +1
We present a statistical study of 130 solar flares (B to X class) that lack soft X-ray quasi-periodic pulsations and show no kink oscillations of nearby coronal loops visible in SD…
Nonlinear steepening of a fast magnetoacoustic wave in the vicinity of a coronal magnetic null point
Yu Zhong, Valery M. Nakariakov, Mariana Cécere +1
The interaction of a fast magnetoacoustic wave with a magnetic null point is studied in the context of the sympathetic flare phenomenon. Attention is paid to steepening the wave ca…
UK White Paper on Magnetohydrodynamic (MHD) seismology of solar and heliospheric plasmas
Valery M. Nakariakov, David B. Jess, Andrew N. Wright +6
Magnetohydrodynamic (MHD) seismology uses naturally occurring MHD waves to infer plasma properties that are otherwise hard to measure, especially magnetic field strength and topolo…
Power-law Indices of EUV Intensity Power Spectrum in Flaring Coronal Active Regions
Sihui Zhong, Dmitrii Y. Kolotkov, Valery M. Nakariakov
Solar intensity power spectra are usually characterised by coloured noise, with the spectral energy following a segmented power-law function of frequency, , ove…
A 50-min coronal kink oscillation and its possible photospheric counterpart
Sihui Zhong, Valery M. Nakariakov, Dmitrii Y. Kolotkov
A coronal loop of 290~Mm length, observed at 171~Å with SDO/AIA on February 6th 2024 near AR 13571, is found to oscillate with two significantly different oscillation periods, $48.…
Detection of kink oscillations in solar coronal loops by a CNN-LSTM neural network
Sergey A. Belov, Yu Zhong, Dmitrii Y. Kolotkov +1
A hybrid machine learning model which combines a shallow convolutional neural network and a long short-term memory network (CNN--LSTM), has been developed to automate the detection…
Undersampling effects on observed periods of coronal oscillations
Daye Lim, Tom Van Doorsselaere, Valery M. Nakariakov +3
Context. Recent observations of decayless transverse oscillations have shown two branches in the relationship between periods and loop lengths. One is a linear relationship, interp…
Detecting quasi-periodic pulsations in solar and stellar flares with a neural network
Sergey A. Belov, Dmitrii Y. Kolotkov, Valery M. Nakariakov +1
Quasi-periodic pulsations (QPP) are often detected in solar and stellar flare lightcurves. These events may contain valuable information about the underlying fundamental plasma dyn…
Transition from decaying to decayless kink oscillations of solar coronal loops
Valery M. Nakariakov, Yu Zhong, Dmitrii Y. Kolotkov
The transition of an impulsively excited kink oscillation of a solar coronal loop to an oscillation with a stationary amplitude, i.e., the damping pattern, is determined using the…
Diagnostics of the solar coronal plasmas by magnetohydrodynamic waves: Magnetohydrodynamic seismology
Valery M. Nakariakov, Sihui Zhong, Dmitrii Y. Kolotkov +3
Macroscopic wave and oscillatory phenomena ubiquitously detected in the plasma of the corona of the Sun are interpreted in terms of magnetohydrodynamic theory. Fast and slow magnet…
Direct Imaging of Magnetohydrodynamic Wave Mode Conversion Near a 3D Null Point on the Sun
Pankaj Kumar, Valery M. Nakariakov, Judith T. Karpen +1
Mutual conversion of various kinds of magnetohydrodynamic (MHD) waves can have profound impacts on wave propagation, energy transfer, and heating of the solar chromosphere and coro…