A TALE ON TWO CLOSE BINARIES IN PEGASUS

ŞENAVCI H. V., YILMAZ M., BAŞTÜRK Ö., Ozavci İ., Caliskan Ş., KILIÇOĞLU T., ...More

BALTIC ASTRONOMY, vol.23, no.2, pp.123-135, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 2
  • Publication Date: 2014
  • Doi Number: 10.1515/astro-2017-0177
  • Journal Name: BALTIC ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.123-135
  • Keywords: stars: binaries: eclipsing, stars: fundamental parameters, stars: individual (BB Peg, V407 Peg), RADIAL-VELOCITY, PHYSICAL PARAMETERS, LIGHT CURVES, SYSTEM, STARS
  • Ankara University Affiliated: Yes

Abstract

We present the simultaneous light and radial velocity curve analysis of two contact binaries in Pegasus using the Wilson-Devinney code. The following absolute astrophysical parameters are determined: masses, radii and effective temperatures. BB Peg is a W-subtype W UMa-type binary, components of which are main sequence stars with 0.50 M-circle dot and 1.40 M-circle dot. The radii of its components are R-1 = 0.81 R-circle dot and R-2 = 1.28 R-circle dot. V407 Peg is an A-subtype contact binary composed of two subgiant components with masses 1.70 M-circle dot and 0.43 M-circle dot, and radii R-1 = 2.17 R-circle dot and R-2 = 1.25 R-circle dot. Comparisons with the theoretical models for solar composition by Girardi et al. (2000) confirms our classification and supports the results.