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Absolute and geometric parameters of the W UMa‐type contact binary V404 Pegasi
Author(s) -
Gürol B.,
Terzioğlu Z.,
Gürsoytrak S.H.,
Gökay G.,
Derman E.
Publication year - 2011
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201111563
Subject(s) - physics , light curve , contact binary , binary number , astrophysics , radial velocity , mass ratio , observatory , type (biology) , binary star , biology , stars , mathematics , ecology , arithmetic
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 ( BVRI ) 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 ⊙ , M 1 = 1.175 M ⊙ , M 2 = 0.286 M ⊙ , R 1 = 1.346 R ⊙ , and R 2 = 0.710 R ⊙ . Finally, we discuss the evolutionary condition of the system (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)