UBV photometry and orbital elements of V453 Cyg.
Abstract
Summary. V 453 Cyg is among those early B-type systems most favorable for the determination of fundamental parameters. Being a member of the relatively young cluster NGC 6871 it is a very massive (17+ 13 ), double4ine and detached eclipsing binary. The apsidal motion (U = 71 ) is well established and both B 0.5 components show non-synchronous rotation. About 2000 observations in each color B and V obtained in a ten year observing period led to new photometric orbital elements. Additional 650 U observations and the fact that the secondary minimum is a total one permitted us by way of the Q-method to derive independent absolute Mv = - 4.1 and -3.2. They agree with those derived by combining the photometric and spectroscopic parameters. The apsidal motion coefficient log k2 = -2.2 turned out to be very small and possibly points to evolution and to an age of about 9 x 106 years. Key words: eclipsing binary - spectroscopic binary - apsidal motion - photometric orbit - absolute dimensions
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1974
- Bibcode:
- 1974A&A....34..317W