MV LYR IN LOW BRIGHTNESS STATES - 2 - BURSTS AND PERIODS

Authors
Citation
Ep. Pavlenko, MV LYR IN LOW BRIGHTNESS STATES - 2 - BURSTS AND PERIODS, Astronomy reports, 42(2), 1998, pp. 200-208
Citations number
37
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
10637729
Volume
42
Issue
2
Year of publication
1998
Pages
200 - 208
Database
ISI
SICI code
1063-7729(1998)42:2<200:MLILBS>2.0.ZU;2-#
Abstract
Based on the observations performed at the Crimean Astrophysical Obser vatory, we analyze the photometric behavior of the nova-like star MV L yr 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; th ree of these cases were single nightly events with an amplitude of 0.5 -1(m), and in the fourth case a sequence of bursts with a quasi-period of 37.6 min and an amplitude of Im was observed. The source of this v ariability is not yet known. We detected periodic light variations wit h an amplitude of about 0.(m)07 and a period of 3.97 days (or 4.67 day s), which is presumably the precession period of the accretion disk. U sing the model of an eccentric precessing disk, we estimated its radiu s, 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.