Absolute parameters of southern eclipsing binary: MW Pup

SÜRGİT D., ERDEM A., ENGELBRECHT C. A.

NEW ASTRONOMY, vol.35, pp.32-35, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35
  • Publication Date: 2015
  • Doi Number: 10.1016/j.newast.2014.08.006
  • Journal Name: NEW ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.32-35
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

This paper presents the first analysis of spectroscopic and photometric observations of the southern eclipsing binary star MW Pup. ASAS V light and SAAO radial velocity curves of the system were solved simultaneously using Wilson-Devinney code. The results describe MW Pup as an Algol-like binary star with a detached configuration. The masses of the components were found to be 2.20 +/- 0.06 and 1.88 +/- 0.07 M-circle dot and the radii to be 1.84 +/- 0.03 and 1.72 +/- 0.03 R-circle dot for primary and secondary components, respectively. The distance to MW Pup was calculated to be 430 +/- 30 pc from the dynamic parallax, neglecting interstellar absorption, in agreement with the value derived from the eclipse-parallax method. The evolution of the system is also discussed. Both components are unevolved Main Sequence stars and the dynamic age of the system is estimated as 263 +/- 70 My when compared to theoretical evolution models. (C) 2014 Elsevier B.V. All rights reserved.