Very short-term behaviour of the flare star EV Lac

Details Very short-term behaviour of the flare star EV Lac Very short-term behaviour of the flare star EV Lac

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.208..205m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 208, no. 2, p. 205-215

Physics

Flare Stars, Spectrum Analysis, Stellar Evolution, Stellar Flares, Stellar Luminosity, Stellar Physics, Photoelectric Emission, Sine Waves, Space Observations (From Earth)

Scientific paper

Sinusoidal variations in Johnson's B-band of the flare star EV Lac have been confirmed at its quiet state luminosity. The cycle lengths are more than one hour and less than two hours with amplitudes varying from 0.105 min to 0.306 min. These registered cycles have agreed with cycles detected by Mavridis and Varvoglis and Mavridis. In the same time, the cycles have confirmed the light variation detection in Johnson's V-band in the same flare star by Pettersen with a cyclic period equals about 4d.378 and an amplitude of about 0.07 min. Our net results confirm, to some extent, the presence of active region(s) as an origin of stellar flare phenomenon of UV Ceti type flare stars. We can cautiously say that the solar and stellar flare phenomenon have a similar origin.

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