Article (Scientific journals)
A search for X-ray sources around WR 22 in the Carina region
Claeskens, Jean-François; Gosset, Eric; Nazé, Yaël et al.
2011In Astronomy and Astrophysics, 525, p. 142
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Keywords :
X-rays: general; X-rays: stars; H ii regions; stars: formation
Abstract :
[en] We present the results of a deep search for X-ray sources in a circular field of 30' in diameter situated around WR 22 in the Carina region and observed with the XMM-Newton observatory. This field is broadly located to the west of the main part of the Carina nebula. On the basis of six pointings (nominal exposure time: 10 ks each) centred on the WR+O binary star WR 22, we perform a survey with an effective exposure time of 68.8 ks. We introduce a catalogue of 43 bona-fide X-ray point sources, most of which were unknown before the XMM-Newton observations, and perform the first steps towards their identifications by cross-correlating the positions with optical/infrared catalogues. We investigated the possible variability of these sources in the X-ray domain and we extracted a few X-ray spectra for the brightest ones. A short description of the diffuse X-ray emission present in the region is also given. Based on observations with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Claeskens, Jean-François ;  Institute of Astrophysics and Geophysics, University of Liège, Allée du 6 août 17, 4000 Liège, Belgium
Gosset, Eric ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Nazé, Yaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique observationnelle (sol et espace)
Rauw, Grégor  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales
Vreux, Jean-Marie ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
A search for X-ray sources around WR 22 in the Carina region
Publication date :
01 January 2011
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
525
Pages :
142
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 January 2011

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