Detection of high-frequency optical oscillations on the flare star EV Lacertae

Authors
Zhilyaev, BE Romanyuk, YO Verlyuk, IA Svyatogorov, OA Khalack, VR Sergeev, AV Konstantinova-Antova, RK Antov, AP Bachev, RS Alekseev, IY Chalenko, VE Shakhovskoy, DN Contadakis, ME Avgoloupis, SJ
Citation
Be. Zhilyaev et al., Detection of high-frequency optical oscillations on the flare star EV Lacertae, ASTRON ASTR, 364(2), 2000, pp. 641-645
Citations number
19
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
364
Issue
2
Year of publication
2000
Pages
641 - 645
Database
ISI
SICI code
0004-6361(200012)364:2<641:DOHOOO>2.0.ZU;2-8
Abstract
Many-site multichannel simultaneous observations of the flare star EV Lac r evealed high-frequency brightness oscillations superimposed on the mean fla re light curve. Oscillations occur at the earliest stage of a flare and are visible during the high state. Coherent oscillations of 26 and 13 sec were seen during three flare events. The pulsed fractions were 2.5% in the B ba nd and 10-15% in the U band. This oscillatory phenomenon can be used to imp rove our understanding of the flare process.