Revealing the Binarity of HD 36030-One of the Hottest Flare Stars

0572123 - ASÚ 2024 RIV CH eng J - Journal Article
Maryeva, Olga - Németh, Péter - Karpov, Sergey
Revealing the Binarity of HD 36030-One of the Hottest Flare Stars.
Galaxies. Roč. 11, č. 2 (2023), č. článku 55. E-ISSN 2075-4434
R&D Projects: GA MŠMT EF15_003/0000437; GA MŠMT(CZ) LM2018102; GA ČR(CZ) GA22-34467S
EU Projects: European Commission(XE) 823734 - POEMS
Research Infrastructure: AUGER-CZ II - 90102
Institutional support: RVO:67985815 ; RVO:68378271
Keywords : stars flares * stars activity * stars binaries spectroscopic
OECD category: Astronomy (including astrophysics,space science); Astronomy (including astrophysics,space science) (FZU-D)
Impact factor: 2.5, year: 2022
Method of publishing: Open access

The Kepler and TESS space missions significantly expanded our knowledge of what types of stars display flaring activity by recording a vast amount of super-flares from solar-like stars, as well as detecting flares from hotter stars of A-F spectral types. Currently, we know that flaring occurs in the stars as hot as B-type ones. However, the structures of atmospheres of hot B-A stars crucially differ from the ones of late types, and thus the occurrence of flaring in B-A type stars requires some extension of our theoretical views of flare formation and therefore a detailed study of individual objects. Here we present the results of our spectral and photometric study of HD 36030, which is a B9 V star with flares detected by the TESS satellite. The spectra we acquired suggest that the star is in a binary system with a low-mass secondary component, but the light curve lacks any signs of periodic variability related to orbital motion or surface magnetic fields. Because of that, we argue that the flares originate due to magnetic interaction between the components of the system.
Permanent Link: https://hdl.handle.net/11104/0342980