Analysis and modeling of the dynamics of the glow of calcium and hydrogen lines in solar and stellar flares

0552237 - ASÚ 2022 RIV PL eng J - Journal Article
Kupryakov, Yu. A. - Bychkov, K. V. - Belova, O. M. - Gorshkov, A. B. - Heinzel, Petr - Kotrč, Pavel
Analysis and modeling of the dynamics of the glow of calcium and hydrogen lines in solar and stellar flares.
Open Astronomy. Roč. 30, č. 1 (2021), č. článku 91. E-ISSN 2543-6376
Institutional support: RVO:67985815
Keywords : flares spectrum * chromosphere * GOES flux
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 0.935, year: 2021
Method of publishing: Open access

We present intensity curves of solar flares obtained in the H alpha hydrogen line and CaII H, CaIR 8542 angstrom lines using multichannel spectrographs of Ondrejov Observatory (Czech Republic) for the period 2000-2012. The general behavior of observed intensity curves is practically the same for all flares and is consistent with temporal variations of X-ray emission. However, our results differ significantly from those obtained by other authors for selected flare stars, for example, AD Leo, EV Lac, YZ CMi . We tried to explain the difference in the behavior of Ca II and H alpha radiation flux by appearance of a shock wave during a flare and slow heating of the plasma.
Permanent Link: http://hdl.handle.net/11104/0327371