A photometric study of the recently discovered eclipsing binary V776 Cassiopei

Details A photometric study of the recently discovered eclipsing binary V776 Cassiopei A photometric study of the recently discovered eclipsing binary V776 Cassiopei

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newa....9..425d&link_type=abstract

New Astronomy, Volume 9, Issue 6, p. 425-434.

Astronomy and Astrophysics

Astronomy

17

Binaries: Eclipsing, Binaries: Close, Stars: Fundamental Parameters, Stars: Individual: V776 Cas

Scientific paper

Photoelectric UBV light curves of the recently discovered eclipsing binary V776 Cas were studied for the first time to derive the physical parameters of the system. The light curves were obtained at the TÜBİTAK National Observatory (TUG) during 8-9 October 2002. Due to the proximity of the visual companion the light curves were contaminated by the third light effect which has a relatively small impact on the system parameters estimation. This effect dominantly changes only the degree of overcontact and orbit inclination. The solutions made by using Djuraševic's inverse-problem method describe the V776 Cas system as a high overcontact configuration (fover~41% without, and 55% and 58% with two different values of the third light effect - L3=0.091 and L3=0.136) with a relatively small temperature differences between the components. Because of the large difference in masses of the components (q=mc/mh=0.13) these solutions suggest a significant mass and energy transfer from the hotter - more massive primary onto the cooler - less massive secondary through the connecting neck of the common envelope. The obtained orbital inclination (i~53∘.9 without, and i~55∘ and i~56∘ with two different values of the third light effect - L3=0.091 and L3=0.136) explains the characteristic shape of the light curves with a relatively small amplitude which is due to partial eclipses of the components in both of the photometric minima.

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