Charge-coupled device observations of V388 CygQ1

Details Charge-coupled device observations of V388 CygQ1 Charge-coupled device observations of V388 CygQ1

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.325..707k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 325, Issue 2, pp. 707-714.

Astronomy and Astrophysics

Astronomy

5

Binaries: Eclipsing, Stars: Individual: V388 Cyg, Stars: Magnetic Fields

Scientific paper

We present BVR full-light curves of V388 Cyg to provide a complete photometric solution for the first time. The light curves show a high degree of asymmetry (O'Connell effect). The maxima at 0.25 phase (Max I) are 0.023, 0.018 and 0.012mag higher than those at 0.75 phase (Max II) in B, V and R, respectively. Three possible spot models are applied to fit the asymmetric light curves of V388 Cyg, in order to explain the O'Connell effect. We conclude that the model of the cool spot on the cooler star is the most reasonable model for V388 Cyg. The continuous period variation is confirmed by recently collected times of minima, including one minimum that is determined in this paper. The period decrease rate is estimated as dp/dt=-2.055×10-7dyr-1.

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