HAL : hal-00278294, version 1

arXiv : 0805.1486

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Obscured High Mass X-Ray Binaries and Supergiant Fast X-ray Transients: Infrared Observations of INTEGRAL Sources

Sylvain Chaty 1, 2, 3

(10/05/2008)

A new type of high-energy binary system has been revealed by the INTEGRAL satellite. These sources are being unveiled by means of multi-wavelength optical, near- and mid-infrared observations. Among these sources, two distinct classes are appearing: the first one is constituted of intrinsically obscured high-energy sources, of which IGR~J16318-4848 seems to be the most extreme example. The second one is populated by the so-called supergiant fast X-ray transients, with IGR~J17544-2619 being the archetype. We report here on multi-wavelength optical to mid-infrared observations of a sample constituted of 21 INTEGRAL sources. We show that in the case of the obscured sources our observations suggest the presence of absorbing material (dust and/or cold gas) enshrouding the whole binary system. We finally discuss the nature of these two different types of sources, in the context of high energy binary systems.

1 :	Astrophysique Interactions Multi-échelles (AIM)
	CNRS : UMR7158 – INSU – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
2 :	Université Paris 7, Paris Diderot (UP7)
	Université Paris VII - Paris Diderot – Ministère de l'Enseignement Supérieur et de la Recherche Scientifique
3 :	Service d'Astrophysique (SAp)
	CEA : DSM/IRFU

Domaine

:

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mots Clés : INTEGRAL – high energy binary systems

hal-00278294, version 1

http://hal.archives-ouvertes.fr/hal-00278294

oai:hal.archives-ouvertes.fr:hal-00278294

Contributeur : Sylvain Chaty <>

Soumis le : Samedi 10 Mai 2008, 18:54:51

Dernière modification le : Samedi 10 Mai 2008, 19:08:25