5 papers · 1 filter
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…
Entropy-mode imprints in the solar corona: non-exponential damping and phase shifts of compressive oscillations
Dmitrii Kolotkov, Sergey Belov, Mohamed Sherif
Magnetohydrodynamic (MHD) waves in coronal loops provide key seismological diagnostics through their characteristic time signatures. While fast and slow magnetoacoustic modes are r…
Cycle dependence of helioseismic oscillations above the acoustic cut-off frequency
Dmitrii Kolotkov, Anne-Marie Broomhall, Laura Jade Millson +1
Helioseismic and recent asteroseismic observations reveal fine structure in the power spectrum with alternating peaks and troughs above the acoustic cut-off frequency. This structu…
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…
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…