Absolute and geometric parameters of the W UMa-type contact binary V404 Pegasi
Abstract
We present the results of our investigation of the geometrical and physical parameters of the W UMa-type binary V404 Peg from analysis of CCD (BV RI) light curves and radial velocity data. The photometric data were obtained during 2010 at Ankara University Observatory (AUO). Light and radial velocity observations were analyzed simultaneously by using the well-known Wilson-Devinney (2007 revision) code to obtain absolute and geometrical parameters. Our solution indicates that V404 Peg is an A-type overcontact binary with a mass ratio of q=0.243 and an overcontact degree of f=32.1 %. Combining our light curves with the radial velocity curves from Maciejewski & Ligeza (2004), we determined the absolute parameters of this system as follows: a=2.672 R⊙, M1=1.175 M_⊙, M_2=0.286 M_⊙, R1=1.346 R⊙, and R2=0.710 R⊙. Finally, we discuss the evolutionary condition of the system.
- Publication:
-
Astronomische Nachrichten
- Pub Date:
- August 2011
- DOI:
- 10.1002/asna.201111563
- Bibcode:
- 2011AN....332..690G
- Keywords:
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- binaries: eclipsing;
- stars: fundamental parameters;
- stars: individual (V404 Peg)