New photometric study of a southern contact binary system: HI Puppis

Ulas B., ULUSOY C.

NEW ASTRONOMY, vol.31, pp.56-59, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31
  • Publication Date: 2014
  • Doi Number: 10.1016/j.newast.2014.02.009
  • Journal Name: NEW ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.56-59
  • Keywords: Stars: binaries: eclipsing, Stars: fundamental parameters, Stars: individual: (HI Pup), STARS, CATALOG, PHYSICS
  • Çanakkale Onsekiz Mart University Affiliated: No


We present results of new photometric observations of the contact binary system HI Pup as well as the radial velocity curve of the system. Time series multicolour photometry was obtained at the South African Astronomical Observatory (SAAO) using the 1-m Cassegrain Telescope. We applied a simultaneous solution to the BVRI light and radial velocity curves in order to determine the physical parameters of the system. From an analysis of the new multicolour data, the physical parameters were found to be M-1 = 1.22M(circle dot), M-2 = 0.23M(circle dot), R-1 = 1.44R(circle dot), R-2 = 0.67R(circle dot), L-1 = 33L(circle dot), L-2 = 0.7L(circle dot). Our solution confirms that HI Pup has a typical A-type W UMa binary system characteristics. (C) 2014 Elsevier B.V. All rights reserved.