Hodge 53-47: an early O-type double-lined binary in the Small Magellanic Cloud

MORRELL, N. I.; OSTROV, P.; MASSEY, P.; GAMEN, R. C.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Año: 2003 vol. 341 p. 582 - 588

0035-8711

We present a spectroscopic and photometric study of the double-lined binary Hodge 53-47 in the Small Magellanic Cloud. We determine for the binary components spectral types of O6 V + O4-5 III(f). Through a simultaneous light and radial velocity curve analysis via the Wilson-Devinney code we find absolute masses of ~26 Msolar and ~16 Msolar and radii of ~10.1 Rsolar and ~8.4 Rsolar for the O6 V and O4-5 III(f) components, respectively. The relatively low mass found for the O4-5 III(f) component suggests that mass transfer and loss have played a significant role in the evolution of these stars.