The cataclysmic binary KR Auriga in February 2002: flickering and oscillations

Details The cataclysmic binary KR Auriga in February 2002: flickering and oscillations The cataclysmic binary KR Auriga in February 2002: flickering and oscillations

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003kfnts...4..173v&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, Suppl, no. 4, p. 173-176

Physics

Scientific paper

KR Aur is known as an anti-dwarf novae in a close binary system consisting of a white dwarf and a red dwarf with orbital period of 3.91 hours. We present first results of the high-speed monitoring of KR Aur during three nights in February 2002 with the 2-m RCC telescope at Terskol Peak in the U band with a time resolution of 0.1 s. Our observations revealed that KR Aur was in its bright state. Rapid flickering and coherent oscillations were observed with amplitudes of some hundredths to some tenths and on time scales of some seconds to some minutes. The total power of short-term variations amounts to about 1.2 % of stellar luminosity in the U band. A coherent oscillation around 0.04 Hz is seen during several nights. Its coherence time is of no less than 7000 cycles. The pulsed fraction is 0.6 % in the U band.

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