ORBi: Gamen R. - The first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25)

Reference : The first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25)


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/15959

Title :	The first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25)
Language :	English
Author, co-author :	Gamen, R. [Departamento de Física, Universidad de La Serena, Benavente 980, La Serena, Chile (rgamen@dfuls.cl).]
	Gosset, Eric [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
	Morrell, N. I. [> > > >]
	Niemela, V. S. [> > > >]
	Sana, H. [> > > >]
	Nazé, Yaël [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales >]
	Rauw, Grégor [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) - Sciences spatiales >]
	Barbá, R. H. [> > > >]
	Solivella, G. R. [> > > >]
Publication date :	1-Aug-2008
Main document title :	Revista Mexicana de Astronomia y Astrofisica Conference Series
Volume :	33
Pages :	91-93
Audience :	International
Keywords :	[en] binaries: spectroscopic ; stars: individual (HD 93162) ; stars: Wolf-Rayet
Abstract :	[en] 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.
Target :	Professionals
Permalink :	http://hdl.handle.net/2268/15959
Other URL :	http://adsabs.harvard.edu/abs/2008RMxAC..33...91G

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