Mv Lyr: Transition from Low to High Brightness State |
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| Authors: | Elena Pavlenko Kirill Antoniuk Sergei Yu Shugarov Nataly A Katysheva Lenie Muzhdabaeva Vyacheslav Mikhajlov |
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| Institution: | (1) Crimean Astrophysical Observatory, Nauchny, Crimea, 98409, Ukraine;(2) Sternberg State Astronomical Institute, Universitetskij Prosp. 13, Moscow, 119992, Russia;(3) Tavrichesky National University, Crimea, 95007, Ukraine;(4) Simferopol Society of Amator Astronomers, Ukraine |
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| Abstract: | We present results of multicolour photometry of the nova-like binary MV Lyr in the years 2002–2003, corresponding to the transition
of the star from its low (V = 17.8) to high (V = 12.3) brightness state. The transition lasted at most 200 days. During the first ∼50 days MV Lyr brightened at the rate
0.06 mag/day, and during the next ∼150 days at the rate 0.01 mag/day. The brightening was accompanied by a blue shift from
0.45 to 0.05 in V−R, interpreted as an increase of the accretion disk contribution to the total light. During the transition MV Lyr displayed
well-known ‘quasi-orbital’ light variations and fast quasi-periodic oscillations with a typical time scale of tens of minutes. |
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| Keywords: | stars binaries MV Lyr |
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