IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
The first orbital solution for the massive colliding-wind binary HD 93162 (≡ WR 25)
Autor/es:
GAMEN, R.; GOSSET, E.; MORRELL, N. I.; NIEMELA, V. S.; SANA, H.; NAZÉ, Y.; RAUW, G.; BARBÁ, R. H.; SOLIVELLA, G. R.
Revista:
REV. MEX. ASTRON. ASTR.
Editorial:
Instituto de Astronomía-UNAM
Referencias:
Lugar: Distrito Federal, Mexico; Año: 2008 vol. 33 p. 91 - 93
ISSN:
1405-2059
Resumen:
Since the discovery, with EINSTEIN, of strong X-ray emission associated
with HD 93162, this object was recurrently predicted by some authors to
be a colliding-wind binary system. However, radial-velocity variations
that would prove the suspected binary nature have never been found so
far. We spectroscopically monitored this object in order to investigate
its possible variability and to provide an answer to the above-mentioned
discordance. We derived radial velocities from spectroscopic data
acquired mainly between 1994 and 2006, and searched for periodicities.
For the first time, periodic radial-velocity variations are detected.
Our analysis definitively shows that the Wolf-Rayet star WR 25 is
actually an eccentric binary system with a probable period of about 208
days.