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dc.contributor.author
Gamen, Roberto Claudio  
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Barba, Rodolfo Hector  
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Walborn, N. R.  
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Morrell, Nidia Irene  
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Arias, Julia Ines  
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Maíz Apellániz, J.  
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Sota, A.  
dc.contributor.author
Alfaro, E. J.  
dc.date.available
2017-01-12T19:32:42Z  
dc.date.issued
2015-11  
dc.identifier.citation
Gamen, Roberto Claudio; Barba, Rodolfo Hector; Walborn, N. R.; Morrell, Nidia Irene; Arias, Julia Ines; et al.; The eccentric short-period orbit of the supergiant fast X-ray transient HD 74194 (=LM Vel); Edp Sciences; Astronomy And Astrophysics; 583; 11-2015; 4-7  
dc.identifier.issn
0004-6361  
dc.identifier.uri
http://hdl.handle.net/11336/11237  
dc.description.abstract
Aims. We present the first orbital solution for the O-type supergiantstar HD 74194, which is the optical counterpart of the supergiant fastX-ray transient IGR J08408-4503. Methods. We measured the radialvelocities in the optical spectrum of HD 74194, and we determined theorbital solution for the first time. We also analysed the complexHα profle. Results. HD 74194 is a binary system composed of anO-type supergiant and a compact object in a short-period (P=9.5436± 0.0002 d) and high-eccentricity (e=0.63 ± 0.03) orbit.The equivalent width of the Hα line is not modulated entirely withthe orbital period, but seems to vary in a superorbital period (P=285± 10 d) nearly 30 times longer than the orbital one.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Edp Sciences  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Spectroscopic Binaries  
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Early Type Stars  
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Hd 74194 (Estrella)  
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Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
The eccentric short-period orbit of the supergiant fast X-ray transient HD 74194 (=LM Vel)  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-01-11T13:26:55Z  
dc.journal.volume
583  
dc.journal.pagination
4-7  
dc.journal.pais
Francia  
dc.journal.ciudad
Paris  
dc.description.fil
Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina  
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Fil: Barba, Rodolfo Hector. Universidad de la Serena; Chile  
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Fil: Walborn, N. R.. Space Telescope Science Institute; Estados Unidos  
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Fil: Morrell, Nidia Irene. Universidad de la Serena; Chile  
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Fil: Arias, Julia Ines. Universidad de la Serena; Chile  
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Fil: Maíz Apellániz, J.. Consejo Superior de Investigaciones Cientificas; España  
dc.description.fil
Fil: Sota, A.. Consejo Superior de Investigaciones Cientificas; España  
dc.description.fil
Fil: Alfaro, E. J.. Consejo Superior de Investigaciones Cientificas; España  
dc.journal.title
Astronomy And Astrophysics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201527140  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/11/aa27140-15/aa27140-15.html  

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