New Photometric Study of A Southern Contact Binary System: HI Puppis

Abstract

We present results of new photometric observations of the contact binary system \astrobj{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 $M_1=1.22M_{\odot }$, $M_2=0.23M_{\odot }$, $R_1=1.44R_{\odot }$, $R_2=0.67R_{\odot }$, $L_1=3.3L_{\odot }$, $L_2=0.7L_{\odot }$. Our solution confirms that HI Pup has a typical A--type W UMa binary system characteristics.

12 pages, 3 Figures, 3 Tables. Accepted for publication in New Astronomy

References in corpus (5)

• Physical parameters of 62 eclipsing binary stars using the ASAS-3 data$-$I
• Angular momentum and mass evolution of contact binaries
• Masses and angular momenta of contact binary stars
• The evolutionary status of W Ursae Majoris-type systems
• Radial Velocity Studies of Southern Close Binary Stars.II

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