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Spectroscopic observations of the δ Scorpii binary during its recent periastron passage

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Spectroscopic observations of the δ Scorpii binary during its recent periastron passage

dc.contributor.author	Miroshnichenko, A.S.
dc.contributor.author	Fabregat Llueca, Juan
dc.contributor.author	Bjorkman, K.S.
dc.contributor.author	Knauth, D.C.
dc.contributor.author	Morrison, N.D.
dc.contributor.author	Tarasov, A.E.
dc.contributor.author	Reig, P.
dc.contributor.author	Negueruela, I.
dc.contributor.author	Blay Serrano, Pedro Jose
dc.date.accessioned	2010-06-18T08:02:04Z
dc.date.available	2010-06-18T08:02:04Z
dc.date.issued	2001
dc.identifier.citation	MIROSHNICHENKO, A.S. ; Fabregat Llueca, Juan ; Bjorkman, K.S. ; Knauth, D.C. ; Morrison, N.D. ; Tarasov, A.E. ; Reig, P. ; Negueruela, I. ; Blay Serrano, Pedro Jose, 2001, Spectroscopic observations of the δ Scorpii binary during its recent periastron passage, Astronomy and Astrophysics, vol. 377, no. 2, p. 485-495	en
dc.identifier.uri	http://hdl.handle.net/10550/12986
dc.description.abstract	The bright star δ Sco has been considered a typical B0-type object for many years. Spectra of the star published prior to 1990 showed no evidence of emission, but only of short-term line profile variations attributed to nonradial pulsations. Speckle interferometric observations show that δ Sco is a binary system with a highlyeccentric orbit and a period of ~10.6 years. Weak emission in the Hα line was detected in its spectrum for the rst time during a periastron passage in 1990. Shortly before the next periastron passage in the summer of 2000, the binary entered a strong Hα emission and enhanced mass-loss phase. We monitored the spectroscopic development of the Be outburst from July 2000 through March 2001. In this paper we present results from our spectroscopy, refine elements of the binary orbit, and discuss possible mechanisms for the mass loss.	en
dc.language.iso	en	en
dc.subject	Emission-line ; Binaries ; Sco ; Spectroscopic Technich	en
dc.title	Spectroscopic observations of the δ Scorpii binary during its recent periastron passage	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA	en
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia	en
dc.identifier.doi	10.1051/0004-6361:20010911	en
dc.identifier.idgrec	030375	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2001/38/aa1284.pdf	en