Astron. Astrophys. Suppl. Ser.
Volume 134, Number 2, January II 1999
|Page(s)||263 - 270|
|Published online||15 January 1999|
MV Lyrae: Photometric study at high state
Institute of Astronomy, Bulgarian Academy of Sciences, 72 Tsarigradsko Shosse Blvd., BG-1784 Sofia, Bulgaria
Send offprint request to: Z. Kraicheva
Accepted: 12 August 1998
Photoelectric observations of novalike MV Lyr in a standard UBV system were carried out at Rozhen and Belogradchik observatories in 1992 and 1993. During all the nights of observations the star was in high state ( 12.5 mag). The observing runs performed in U and B bands show strong flickering activity and a typical shape of the red noise power spectrum. The periodogram analysis of time series shows quasi-periodic oscillations with a period of about 50 min. The excitation of trapped oscillations at the outer edge of the accretion disc, has been proposed as a possible mechanism for generation of MV Lyr quasi-periodic oscillations. The properties of the flickering in MV Lyr light curves were determined.
Key words: accretion, accretion disks / stars: MV Lyr / stars: novae, cataclysmic variables / X-ray: stars
© European Southern Observatory (ESO), 1999