Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001an....322..125a&link_type=abstract
Astronomische Nachrichten, vol. 322, no. 2, p. 125-135.
Astronomy and Astrophysics
Astronomy
6
Scientific paper
Photometric BV light curves of BO CVn obtained in 1992 and new times of minima are presented. The primary minimum shows a transit, whereas the secondary minimum, shows an occultation. The system may be classified as an A-type W UMa system. A complete study of minima allows one to detect a possibly increasing period by about 0.037 s/yr. This indicates that the conservative mass transfer rate from the less massive component to the more massive one is 1.57 10 - 10Msun /yr. Because of the variable period, the new ephemeris is determined for future observations. Using the Wilson-Devinney code a simultaneous solution of the B and V light curves is also performed. The analysis shows that the system is in a contact configuration with q = 0.205 +/- 0.001 and fillout factor (f) = 0.18, T1 = 7240 K (fixed), T2 = 7150 +/- 10 K. The high orbital inclination i = 87.54 deg +/- 0.26 was con firmed by photometric observations of the secondary minimum.
Albayrak Berahitdin
Müyesserolu Z.
Özdemir Sacit
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