کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1779208 | 1021982 | 2012 | 6 صفحه PDF | دانلود رایگان |
We present the results of the study of the contact binary system BO CVn. We have obtained physical parameters of the components based on combined analysis of new, multi-color light curves and spectroscopic mass ratio. This is the first time the latter has been determined for this object. We derived the contact configuration for the system with a very high filling factor of about 88%. We were able to reproduce the observed light curve, namely the flat bottom of the secondary minimum, only if a third light has been added into the list of free parameters. The resulting third light contribution is significant, about 20–24%, while the absolute parameters of components are: M1 = 1.16, M2 = 0.39, R1 = 1.62 and R2 = 1.00 (in solar units).The O-C diagram shows an upward parabola which, under the conservative mass transfer assumption, would correspond to a mass transfer rate of dM/dt = 6.3 × 10−8M⊙/yr, matter being transferred from the less massive component to the more massive one. No cyclic, short-period variations have been found in the O-C diagram (but longer-term variations remain a possibility).
► We made a combined solution of multicolor light curves and spectroscopic data of the eclipsing system BO Cvn.
► The physical parameters of components are derived.
► The system configuration was found to be contact with a very high filling factor.
► Introduction of a third light was necessary to reproduce the observed flat bottom secondary minimum.
Journal: New Astronomy - Volume 17, Issue 8, November 2012, Pages 673–678