Reference : The first orbital solution for the massive colliding-wind binary HD 93162 ( WR 25)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/1833
The first orbital solution for the massive colliding-wind binary HD 93162 ( WR 25)
English
Gamen, R. [> > > >]
Gosset, Eric mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Morrell, N. [> > > >]
Niemela, V. [> > > >]
Sana, H. [> > > >]
Nazé, Yaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Rauw, Grégor mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Barba, R. [> > > >]
Solivella, G. [> > > >]
Dec-2006
Astronomy and Astrophysics
Edp Sciences S A
460
3
777-782
Yes (verified by ORBi)
International
0004-6361
Les Ulis Cedex A
[en] stars : binaries : spectroscopic ; stars : Wolf-Rayet ; stars : individual : HD 93162
[en] Context. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (equivalent to WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. Aims. We spectroscopically monitored this object to investigate its possible variability to address this discordance. Methods. We compiled the largest available radial-velocity data set for this star to look for variations that might be due to binary motion. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched these radial velocities for periodicities using different numerical methods. Results. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR 25 is an eccentric binary system with a probable period of about 208 days.
Researchers ; Professionals
http://hdl.handle.net/2268/1833
10.1051/0004-6361:20065618
http://arxiv.org/abs/astro-ph/0609454

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