Superhumps in Cataclysmic Binaries. IV. MV Lyrae

Details Superhumps in Cataclysmic Binaries. IV. MV Lyrae Superhumps in Cataclysmic Binaries. IV. MV Lyrae

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..545s&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.107, p.545

Astronomy and Astrophysics

Astronomy

25

Cataclysmic Variables, Binaries: Close

Scientific paper

We report the results of a photometric and spectroscopic campaign on the nova-like variable MV Lyrae in a "high state" during August/September 1993. Radial-velocity observations establish an underlying binary period of 0.1329 +- 0.0004 d, with a remarkably small K-amplitude of 25 +- 4 km/s. The very low K-values for both stars in the binary attest to a very low binary inclination, in the range 10 - 13 degrees. Our photometric data seems to confirm two of the period signals reported by Barisov (1992): quasi-periodic oscillations with a period of 48 minutes, and a slow wave with a period ~3.6 d. On the third signal reported by Borisov, "superhumps" with a period of 0.138 d, our data are less strongly supportive but still tend to favor the existence of the signal. The mass ratio of the binary is 0.43^+0.19_-0.13, somewhat higher than usually assumed in theoretical studies of superhumps. (SECTION: Stars)

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