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dc.date.accessioned 2019-12-05T17:17:58Z
dc.date.available 2019-12-05T17:17:58Z
dc.date.issued 2015
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/86912
dc.description.abstract Aims. We present the first orbital solution for the O-type supergiant star HD 74194, which is the optical counterpart of the supergiant fast X-ray transient IGR J08408-4503. Methods. We measured the radial velocities in the optical spectrum of HD 74194, and we determined the orbital solution for the first time. We also analysed the complex Hα profile. Results. HD 74194 is a binary system composed of an O-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 with the orbital period, but seems to vary in a superorbital period (P = 285 ± 10 d) nearly 30 times longer than the orbital one. en
dc.language en es
dc.subject Binaries: spectroscopic es
dc.subject Stars: early-type es
dc.subject Stars: individual: HD 74194 es
dc.title The eccentric short-period orbit of the supergiant fast X-ray transient HD 74194 (=LM Vel) en
dc.type Articulo es
sedici.identifier.other doi:10.1051/0004-6361/201527140 es
sedici.identifier.other eid:2-s2.0-84946595537 es
sedici.identifier.issn 0004-6361 es
sedici.creator.person Gamen, Roberto Claudio es
sedici.creator.person Barbá, Rodolfo Héctor es
sedici.creator.person Walborn, N. R. es
sedici.creator.person Morrell, Nidia Irene es
sedici.creator.person Arias, Julia Inés es
sedici.creator.person Maíz Apellániz, J. es
sedici.creator.person Sota, A. es
sedici.creator.person Alfaro, E. J. es
sedici.subject.materias Ciencias Astronómicas es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Astronómicas y Geofísicas es
mods.originInfo.place Instituto de Astrofísica de La Plata es
sedici.subtype Contribucion a revista es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Astronomy and Astrophysics es
sedici.relation.journalVolumeAndIssue vol. 583 es
sedici.rights.sherpa * Color: green * Pre-print del autor: can * Post-print del autor: can * Versión de editor/PDF:can * Condiciones: >>On author's personal website or institutional website or OAI compliant website >>Some journals require an embargo for deposit in funder's designated repositories (see journal) >>Publisher's version/PDF may be used (see journal) >>Must link to publisher version >>Publisher copyright and source must be acknowledged >>Non-commercial * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0004-6361/es/


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)