K-band observations of WZ Sagittae during quiescence

Details K-band observations of WZ Sagittae during quiescence K-band observations of WZ Sagittae during quiescence

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mnras.336.1223s&link_type=abstract

Monthly Notice of the Royal Astronomical Society, Volume 336, Issue 4, pp. 1223-1228.

Astronomy and Astrophysics

Astronomy

13

Accretion, Accretion Discs, Binaries: Close, Stars: Individual: Wz Sge, Stars: Magnetic Fields

Scientific paper

We present high-speed K-band photometry of WZ Sge obtained 2 yr before the recent 2001 superoutburst. Our data show the first ever detection of a disc eclipse in WZ Sge during quiescence. Analysis of the ingress and egress times of the disc and bright spot gives constraints on the system parameters of M1= 0.740 +/- 0.071 Msolar, M2= 0.0445 +/- 0.0027 Msolar and . Oscillations at 27.88 s +/- 0.01 s and 28.61 s +/- 0.01 s are present in the infrared light curve. We determine the infrared oscillation parameters and discuss the source of the oscillations. We analyse the long-term brightness variation in the K-band light curves and find no evidence for a precessing, elliptical accretion disc in quiescence.

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