Early optical follow-up of the nearby active star DG CVn during its 2014 superflare

0449052 - ASÚ 2016 RIV GB eng J - Journal Article
Caballero-Garcia, M.D. - Šimon, Vojtěch - Jelínek, M. - Castro-Tirado, A.J. - Cwiek, A. - Claret, A. - Opiela, R. - Zarnecki, A.F. - Gorosabel, J. - Oates, S.R. - Cunniffe, R. - Jeong, S. - Hudec, René - Sokolov, V. V. - Makarov, D.I. - Tello, J. - Lara-Gil, O. - Kubánek, Petr - Guziy, S. - Bai, J. - Fan, Y. - Wang, C. - Park, I.H.
Early optical follow-up of the nearby active star DG CVn during its 2014 superflare.
Monthly Notices of the Royal Astronomical Society. Roč. 452, č. 4 (2015), s. 4195-4202. ISSN 0035-8711. E-ISSN 1365-2966
EU Projects: European Commission(XE) 283783 - GLORIA
Grant - others:GA ČR(CZ) GA13-33324S
Institutional support: RVO:67985815 ; RVO:68378271
Keywords : stars * activity * flare
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 4.952, year: 2015

DG Canum Venaticorum (DG CVn) is a binary system in which one of the components is an M-type dwarf ultrafast rotator, only three of which are known in the solar neighbourhood. Observations of DG CVn by the Swift satellite and several ground-based observatories during its superflare event on 2014 allowed us to perform a complete hard X-ray-optical follow-up of a superflare from the red-dwarf star. The observations support the fact that the superflare can be explained by the presence of (a) large active region(s) on the surface of the star. Such activity is similar to the most extreme solar flaring events. This points towards a plausible extrapolation between the behaviour from the most active red-dwarf stars and the processes occurring in the Sun.
Permanent Link: http://hdl.handle.net/11104/0250861