HD 61273: a new semi-detached binary with an accretion disk

Details HD 61273: a new semi-detached binary with an accretion disk HD 61273: a new semi-detached binary with an accretion disk

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..211r&link_type=abstract

Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he

Astronomy and Astrophysics

Astrophysics

Scientific paper

A detailed spectroscopic and photometric analysis shows for the first time that HD 61273 is a close binary system, composed of a dwarf early-type star and a K0 giant. The system underwent and perhaps still undergoes a mass transfer. The most evolved star fills its Roche lobe and transfers mass to the hotter companion which is now the most massive component of the system. The Halpha line displays a variable emission: signature of an accretion disk. This new semi-detached system is not eclipsing, but only shows photometric ellipsoidal variability due to the elongated shape of the giant component filling its Roche lobe, with a 12.919 day period.

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