NAGIOS: RODERIC FUNCIONANDO

The Be/X-ray binary LS 992/RX J0812.4-3114: Physical parameters and long-term variability

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

The Be/X-ray binary LS 992/RX J0812.4-3114: Physical parameters and long-term variability

dc.contributor.author	Reig Torres, Pablo
dc.contributor.author	Negueruela, I.
dc.contributor.author	Buckley, D.A.H.
dc.contributor.author	Coe, M.J.
dc.contributor.author	Fabregat Llueca, Juan
dc.contributor.author	Haigh, N.J.
dc.date.accessioned	2010-06-18T11:10:16Z
dc.date.available	2010-06-18T11:10:16Z
dc.date.issued	2001
dc.identifier.citation	REIG TORRES, Pablo ; Negueruela, I. ; Buckley, D.A.H. ; Coe, M.J. ; Fabregat Llueca, Juan ; Haigh, N.J., 2001, The Be/X-ray binary LS 992/RX J0812.4-3114: Physical parameters and long-term variability, Astronomy and Astrophysics, vol. 367, no. 1, p. 266-272	en
dc.identifier.uri	http://hdl.handle.net/10550/13001
dc.description.abstract	We present the first long-term optical and infrared study of the optical counterpart to the source RX J0812.4-3114, an X-ray pulsar with a Be type companion. During the period covered by the observations the profile of some Balmer lines changed from absorption to emission and back again to absorption. Contemporaneously, the infrared magnitudes varied by more than 0.8 mag. This long-term variability is interpreted as the formation and subsequent dissipation of the Be star's disc. The building up of the disc ended up in an active X-ray state characterised by regular outbursts occurring at 80 day intervals. The overall duration of the formation/dissipation of the disc is found to be ~< 4.3 years. Optical spectroscopic and infrared photometric observations were used to re ne the spectral type of the primary (B0.2IV) and to monitor the circumstellar envelope around the Be star. UBVRI and uvbyβ photometric observations allowed the determination of the astrophysical parameters of the optical companion.	en
dc.language.iso	en	en
dc.subject	Individual star ; LS 992/RX J0812.4-3114 ; Binaries ; Pulsars Emission-line ; Be ; X-rays	en
dc.title	The Be/X-ray binary LS 992/RX J0812.4-3114: Physical parameters and long-term variability	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	10.1051/0004-6361:20000238	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/2001/07/aah2368.pdf	en