MV Lyr in low brightness states: 2. Bursts and periods

Details MV Lyr in low brightness states: 2. Bursts and periods MV Lyr in low brightness states: 2. Bursts and periods

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998arep...42..200p&link_type=abstract

Astronomy Reports, Volume 42, Issue 2, March 1998, pp.200-208

Astronomy and Astrophysics

Astronomy

4

Scientific paper

Based on the observations performed at the Crimean Astrophysical Observatory, we analyze the photometric behavior of the nova-like star MV Lyr in the low brightness state in 1995-1996. MV Lyr exhibited a burst activity on a time scale from 15 to 55 min in four of the 30 cases; three of these cases were single nightly events with an amplitude of 0.5-1m, and in the fourth case a sequence of bursts with a quasi-period of 37.6 min and an amplitude of 1m was observed. The source of this variability is not yet known. We detected periodic light variations with an amplitude of about 0.07m and a period of 3.97 days (or 4.67 days), which is presumably the precession period of the accretion disk. Using the model of an eccentric precessing disk, we estimated its radius, which depends on the precession period, to be 0.31a (or 0.28a) for q = 0.3, where a is the separation between the components.

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