Zobrazeno 1 - 10
of 511
pro vyhledávání: '"Oláh, K."'
Autor:
Kővári, Zs., Strassmeier, K. G., Kriskovics, L., Oláh, K., Borkovits, T., Seli, B., Vida, K., Radványi, Á.
Tidal forces in close binaries and multiple systems that contain magnetically active component are supposed to influence the operation of magnetic dynamo. Through synchronization the tidal effect of a close companion helps maintain fast rotation, thu
Externí odkaz:
http://arxiv.org/abs/2408.16438
On the Sun, the energetic, erupting phenomena of flares and coronal mass ejections (CMEs) often occur together. While space-based photometry has revealed frequent white-light flares for vast numbers of stars, only a handful of coronal mass ejections
Externí odkaz:
http://arxiv.org/abs/2407.11461
Autor:
Kovari, Zs., Strassmeier, K. G., Kriskovics, L., Olah, K., Borkovits, T., Radvanyi, A., Granzer, T., Seli, B., Vida, K., Weber, M.
We are conducting a comprehensive investigation of V815 Her using photometric and spectroscopic data to understand the origin of the activity and what influences it in the short and long term. Using TESS photometry we performed light curve modeling i
Externí odkaz:
http://arxiv.org/abs/2312.08416
EI Eridani: a star under the influence -- The effect of magnetic activity in the short and long term
Autor:
Kriskovics, L., Kővári, Zs., Seli, B., Oláh, K., Vida, K., Henry, G. W., Granzer, T., Görgei, A.
Publikováno v:
A&A 674, A143 (2023)
We use our photometric time series of more than forty years to analyze the long-term behaviour of EI Eri. Flare activity is investigated using space-borne photometric data obtained with TESS. The MUSICOS campaign aimed to achieve high-resolution spec
Externí odkaz:
http://arxiv.org/abs/2304.13234
Autor:
Seli, B., Oláh, K., Kriskovics, L., Kővári, Zs., Vida, K., Balázs, L. G., Laming, J. M., van Driel-Gesztelyi, L., Baker, D.
Publikováno v:
A&A 659, A3 (2022)
The different elemental abundances of the photosphere and the corona are striking features of not only the Sun, but other stars as well. This phenomenon is known as the FIP effect (FIP stands for first ionization potential), and its strength can be c
Externí odkaz:
http://arxiv.org/abs/2111.14735
Autor:
Kővári, Zs., Kriskovics, L., Oláh, K., Odert, P., Leitzinger, M., Seli, B., Vida, K., Borkovits, T., Carroll, T.
Publikováno v:
A&A 650, A158 (2021)
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 chromosphere up to the corona. We aim at studying how the magnetic dyna
Externí odkaz:
http://arxiv.org/abs/2103.02041
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 such a magnitude difference. We investigate the flaring activity of KIC 2
Externí odkaz:
http://arxiv.org/abs/2101.05025
Publikováno v:
A&A 647, A62 (2021)
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 the released flare energies. The role of oscillation in suppressing ma
Externí odkaz:
http://arxiv.org/abs/2010.07623
Autor:
Kővári, Zs., Oláh, K., Günther, M. N., Vida, K., Kriskovics, L., Seli, B., Bakos, G. Á., Hartman, J. D., Csubry, Z., Bhatti, W.
Publikováno v:
A&A 641, A83 (2020)
The most powerful superflares reaching 10$^{39}$erg bolometric energy are from giant stars. The mechanism behind flaring is supposed to be the magnetic reconnection, which is closely related to magnetic activity including starspots. However, it is po
Externí odkaz:
http://arxiv.org/abs/2005.05397
Publikováno v:
A&A 627, A52 (2019)
Young, fast rotating single stars can show dramatically different magnetic signatures and levels of magnetic activity as compared with the Sun. While losing angular momentum due to magnetic breaking and mass loss through stellar winds, the stars grad
Externí odkaz:
http://arxiv.org/abs/1905.08310