Fundamental parameters for the eclipsing binary AzV 73 in the Small Magellanic Cloud

Free access article

Issue		A&A Volume 380, Number 1, December II 2001


Page(s)		258 - 263
Section		Formation, structure and evolution of stars
DOI		http://dx.doi.org/10.1051/0004-6361:20011399

A&A 380, 258-263 (2001)
DOI: 10.1051/0004-6361:20011399

Fundamental parameters for the eclipsing binary AzV 73 in the Small Magellanic Cloud

P. G. Ostrov

Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, 1900 La Plata, Argentina

(Received 6 July 2001 / Accepted 5 October 2001)

Abstract
A CCD V light curve for the eclipsing binary star AzV 73 is presented. This new photometric observations are analysed together with previously published CCD I photometry from Udalski et al. (1998) and spectrographic data from Niemela & Bassino (1994), by means of the Wilson-Devinney code. It is found that this system is semi-detached, with an orbital inclination of roughly $86 \degr$ and a separation of $42 R_{\odot}$ . The sizes and masses are $R_1=11.53 \pm 0.5 R_{\odot}$ , $M_1=25.26 \pm 0.7 M_{\odot}$ , and $R_2=15.46 \pm 0.4 R_{\odot}$ , $M_2=21.96 \pm 0.8 M_{\odot}$ for the primary and secondary components, respectively.

Key words: binaries: eclipsing -- stars: early-type -- stars: fundamental parameters -- stars: individual: AzV 73

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