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

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

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...364..641z&link_type=abstract

Astronomy and Astrophysics, v.364, p.641-645 (2000)

Astronomy and Astrophysics

Astrophysics

12

Stars: Flare, Stars: Oscillations, Stars: Individual: Ev Lac

Scientific paper

Many-site multichannel simultaneous observations of the flare star EV Lac revealed high-frequency brightness oscillations superimposed on the mean flare 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 band and 10-15% in the U band. This oscillatory phenomenon can be used to improve our understanding of the flare process.

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