Unveiling the nature of six HMXBs through IR spectroscopy
NAGIOS: RODERIC FUNCIONANDO

Unveiling the nature of six HMXBs through IR spectroscopy

DSpace Repository

Unveiling the nature of six HMXBs through IR spectroscopy

Show simple item record

dc.contributor.author Nespoli, Elisa
dc.contributor.author Fabregat Llueca, Juan
dc.contributor.author Mennickent, R. E.
dc.date.accessioned 2010-06-29T11:05:31Z
dc.date.available 2010-06-29T11:05:31Z
dc.date.issued 2008
dc.identifier.uri http://hdl.handle.net/10550/14016
dc.description.abstract Context. The International Gamma-Ray Astrophyiscs Laboratory (INTEGRAL) is discovering a large number of new hard X-ray sources, many of them being HMXBs. The identification and spectral characterization of their optical/infrared counterparts is a necessary step to undertake detailed study of these systems. In particular, the determination of the spectral type is crucial in the case of the new class of Supergiant Fast X-ray Transients (SFXTs), which show X-ray properties common to other objects. Aims. Our goal is to perform spectral analysis and classification of proposed counterparts to HMXBs in order to characterize the system they belong to. Methods. We used the ESO/NTT SofI spectrograph to observe proposed IR counterparts to HMXBs, obtaining Ks medium resolution spectra (R = 1320) with a S/N 􏰀 100. We classified them through comparison with published atlases. Results. We were able to spectrally classify the six sources. This allowed us to ascribe one of them to the new class of SFXTs and confirm the membership of two sources to this class. We confirmed the spectral classification, derived from optical spectroscopy, of a known system, 4U 1907-09, showing for the first time its infrared spectrum. The spectral classification was also used to estimate the distance of the sources. We compared the extinction as derived from X-ray data with effective interstellar extinction obtained from our data, discussing the absorption component due to the circumstellar environment, which we observed in four systems; in particular, intrinsic absorption seems to emerge as a typical feature of the entire class of SFXTs. en
dc.language.iso en en
dc.relation http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361:200809645&Itemid=129 en
dc.source Nespoli, E., Fabregat, J. and Mennickent, R. E. (2008): Unveiling the nature of six HMXBs through IR spectroscopy, Astronomy and Astrophysics, núm. 486, vol. 3, pp. 911-917 en
dc.subject X-rays : binaries; Stars : supergiants; Accretion, accretion disks; Infrared : stars en
dc.title Unveiling the nature of six HMXBs through IR spectroscopy en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Fuentes de Rayos X en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellas en
dc.identifier.doi 10.1051/0004-6361:200809645 en
dc.description.private nese@uv.es; fabregaj@uv.es; en
dc.identifier.idgrec 049050 en

View       (586.9Kb)

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse

Statistics