Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Kolotkov, Dmitrii Y"'
Autor:
Lim, Daye, Van Doorsselaere, Tom, Nakariakov, Valery M., Kolotkov, Dmitrii Y., Gao, Yuhang, Berghmans, David
Publikováno v:
A&A 690, L8 (2024)
Context. Recent observations of decayless transverse oscillations have shown two branches in the relationship between periods and loop lengths. One is a linear relationship, interpreted as a standing mode. The other shows almost no correlation and ha
Externí odkaz:
http://arxiv.org/abs/2409.12095
Sub-photospheric acoustic resonators allow for the formation of standing p-mode oscillations by reflecting acoustic waves with frequencies below the acoustic cut-off frequency. We employ the Klein-Gordon equation with a piecewise acoustic potential t
Externí odkaz:
http://arxiv.org/abs/2408.11120
Quasi-periodic pulsations (QPP) are often detected in solar and stellar flare lightcurves. These events may contain valuable information about the underlying fundamental plasma dynamics as they are not described by the standard flare model. The detec
Externí odkaz:
http://arxiv.org/abs/2408.05038
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 low-dimensional self-oscillation model. In the model, the decayless ki
Externí odkaz:
http://arxiv.org/abs/2406.07490
Autor:
Nakariakov, Valery M., Zhong, Sihui, Kolotkov, Dmitrii Y., Meadowcroft, Rebecca L., Zhong, Yu, Yuan, Ding
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 magnetoacoustic waves are clearly distinguished in observations. Properties
Externí odkaz:
http://arxiv.org/abs/2404.00105
The highly-filamented nature of the coronal plasma significantly influences dynamic processes in the corona such as magnetohydrodynamic waves and oscillations. Fast magnetoacoustic waves, guided by coronal plasma non-uniformities, exhibit strong geom
Externí odkaz:
http://arxiv.org/abs/2311.14512
Autor:
Zhong, Sihui, Nakariakov, Valery M., Kolotkov, Dmitrii Y., Chitta, Lakshmi Pradeep, Antolin, Patrick, Verbeeck, Cis, Berghmans, David
Decayless kink oscillations of plasma loops in the solar corona may contain an answer to the enigmatic problem of solar and stellar coronal heating. The polarisation of the oscillations gives us a unique information about their excitation mechanisms
Externí odkaz:
http://arxiv.org/abs/2308.10573
The back-reaction of the perturbed thermal equilibrium in the solar corona on compressive perturbations, also known as the effect of wave-induced thermal misbalance, is known to result in thermal instabilities chiefly responsible for the formation of
Externí odkaz:
http://arxiv.org/abs/2301.09012
Autor:
Kolotkov, Dmitrii Y.
Slow magnetoacoustic waves represent an important tool for probing the solar coronal plasma. We quantitatively assess the applicability of the weak thermal conduction theory to coronal seismology by slow waves. We numerically model the linear standin
Externí odkaz:
http://arxiv.org/abs/2211.12233
Decayless kink oscillations of solar coronal loops are studied in terms of a low-dimensional model based on a randomly driven Rayleigh oscillator with coefficients experiencing random fluctuations. The model considers kink oscillations as natural mod
Externí odkaz:
http://arxiv.org/abs/2209.06343