V light curve of SDSS J080434.20+510349.2 (Zharikov+, 2008)

Details V light curve of SDSS J080434.20+510349.2 (Zharikov+, 2008) V light curve of SDSS J080434.20+510349.2 (Zharikov+, 2008)

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ycat..34860505z&link_type=abstract

VizieR On-line Data Catalog: J/A+A/486/505. Originally published in: 2008A&A...486..505Z

Physics

Binaries: Cataclysmic, Stars: Variable, Photometry

Scientific paper

We observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 to study the origin of long-term variability found in its light curve.
Multi-longitude, time-resolved, photometric observations were acquired to analyze this uncommon behavior, which has been found in two newly discovered CVs.
This study of SDSS J080434.20+510349.2 concerns primarily the understanding of the nature of the observed, double-humped, light curve and its relation to a cyclic brightening that occurs during quiescence. The observations were obtained early in 2007, when the object was at about V~17.1, about 0.4mag brighter than the pre-outburst magnitude. The light curve shows a sinusoidal variability with an amplitude of about 0.07mag and a periodicity of 42.48min, which is half of the orbital period of the system. We observed in addition two "mini-outbursts" of the system of up to 0.6mag, which have a duration of about 4days each. The "mini-outburst" has a symmetric profile and is repeated in approximately every 32days. Subsequent monitoring of the system shows a cyclical behavior of such "mini-outbursts" with a similar recurrence period. The origin of the double-humped light curve and the periodic brightening is discussed in the light of the evolutionary state of SDSS J080434.20+510349.2.
(2 data files).

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