Spectroscopic characterization of superflares on solar-type stars - a joint observing campaign

0585612 - ASÚ 2025 RIV SK eng J - Journal Article
Leitzinger, M. - Kabáth, Petr - Vaňko, M. - Pribulla, T. - Komžík, R. - Garai, Z. - Karjalainen, Raine - Odert, P. - Lipták, J. - Heinzel, Petr - Wollmann, J - Greimel, R. - Guenther, E.W.
Spectroscopic characterization of superflares on solar-type stars - a joint observing campaign.
Contributions of the Astronomical Observatory Skalnaté Pleso. Roč. 54, č. 2 (2024), s. 190-193. ISSN 1335-1842. E-ISSN 1336-0337
R&D Projects: GA ČR(CZ) GF22-30516K
Institutional support: RVO:67985815
Keywords : stars * solar-type * stellar activity
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 0.5, year: 2022
Method of publishing: Open access

We present here one step of joint observational efforts to spectroscopically characterize superflares. We focus on the solar-type stars EK Dra, V833 Tau, and BY Dra, as those are relatively bright and active, and especially V833 Tau shows a high superflare rate in TESS data. The spectroscopic observations have been done at the Skalnaté Pleso observatory operated by the Slovak Academy of Sciences and the Ondřejov observatory operated by the Czech Academy of Sciences. Coordinated photometry in two filters has been done at Stará Lesná/Skalnaté Pleso observatory run by the Slovak Academy of Sciences, ELTE Gothard Astrophysical Observatory, Szombathely, Hungary, and Lustbühel Observatory run by the University of Graz, Austria. In total around 24 hours were spent on EK Dra, 12 hours on BY Dra, and 20 hours on V833 Tau. However, no superflares have been detected. We discuss detection probabilities and the importance of studying superflares spectroscopically.

Permanent Link: https://hdl.handle.net/11104/0353291