High-frequency optical oscillations on the flare star EV Lacertae

Details High-frequency optical oscillations on the flare star EV Lacertae High-frequency optical oscillations on the flare star EV Lacertae

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..339z&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 339-340

Physics

Scientific paper

Due to many-site multicolor synchronous monitoring of the flare star EV Lac and the careful treatment of the data obtained, we have confirmed the reality of rapid optical brightness oscillations during a significant part of a flare lifetime as was discovered by Rodonó in 1974. Our findings, based on three flare events in EV Lac, allow us to conclude that high frequency optical oscillations are coherent, with periods of 13 and 26 s and amplitudes of 0.025 mag in the B band and larger by a factor of 5 in the U band. As found, UBV color indices of the mean flare light curve differ significantly from those of the oscillations.

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