289 citations · 926 across the 20 of their papers we have counts for
21 papers
Activity of TRAPPIST-1 analogue stars observed with TESS
Bálint Seli, Krisztián Vida, Attila Moór +2
As more exoplanets are being discovered around ultracool dwarfs, understanding their magnetic activity -- and the implications for habitability -- is of prime importance. To find s…
A confined dynamo: magnetic activity of the K-dwarf component in the pre-cataclysmic binary system V471 Tauri
Zs. Kővári, L. Kriskovics, K. Oláh +6
We scrutinize the red dwarf component in the eclipsing binary system V471 Tau in order to unravel relations between different activity layers from the stellar surface through the c…
KIC 2852961 -- a superflaring red monster in the Kepler field
Zs. Kővári, K. Oláh, M. N. Günther +3
Superflares on giant stars have up to 100,000 times more energy than the high energy solar flares. However, it is disputed, whether scaling up a solar-type dynamo could explain suc…
Towards the true number of flaring giant stars in the Kepler field. Are there flaring specialities associated with the giant nature?
K. Oláh, Zs. Kővári, M. N. Günther +4
We aim to give a reliable estimate of the number of flaring giant stars in the Kepler field. By analyzing the flaring activity of these stars we explore their flare statistics and…
Flaring activity of Proxima Centauri from TESS observations: quasi-periodic oscillations during flare decay and inferences on the habitability of Proxima b
Krisztián Vida, Katalin Oláh, Zsolt Kővári +3
We analyze the light curve of the M5.5 dwarf Proxima Centauri obtained by the TESS in Sectors 11 and 12. In the day-long light curve we identified and analyzed 72 flar…
Cycle period, differential rotation and meridional flow for early M dwarf stars
M. Küker, G. Rüdiger, K. Oláh +1
Recent observations suggest the existence of two characteristic cycle times for early-type M stars dependent on the rotation period. They are of order one year for the fast rotator…