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A photometric study of the recently discovered eclipsing binary V776 Cassiopei
Photoelectric UBV light curves of the recently discovered eclipsingbinary V776 Cas were studied for the first time toderive the physical parameters of the system. The light curves wereobtained at the TÜBİTAK National Observatory (TUG) during 8-9October 2002. Due to the proximity of the visual companion the lightcurves were contaminated by the third light effect which has arelatively small impact on the system parameters estimation. This effectdominantly changes only the degree of overcontact and orbit inclination.The solutions made by using Djuraševic's inverse-problem methoddescribe the V776 Cas system as a high overcontactconfiguration (fover~41% without, and 55% and 58% with twodifferent values of the third light effect - L3=0.091 andL3=0.136) with a relatively small temperature differencesbetween the components. Because of the large difference in masses of thecomponents (q=mc/mh=0.13) these solutions suggesta significant mass and energy transfer from the hotter - more massiveprimary onto the cooler - less massive secondary through the connectingneck of the common envelope. The obtained orbital inclination(i~53∘.9 without, and i~55∘ andi~56∘ with two different values of the third lighteffect - L3=0.091 and L3=0.136) explains thecharacteristic shape of the light curves with a relatively smallamplitude which is due to partial eclipses of the components in both ofthe photometric minima.
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Observation and Astrometry data
| Constellation: | Κασσιόπη |
| Right ascension: | 01h55m26.35s |
| Declination: | +70°29'08.3" |
| Apparent magnitude: | 8.374 |
| Distance: | 246.914 parsecs |
| Proper motion RA: | 2.4 |
| Proper motion Dec: | -14.1 |
| B-T magnitude: | 9.672 |
| V-T magnitude: | 8.482 |
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