| Issue |
A&A
Volume 525, January 2011
|
|
|---|---|---|
| Article Number | A142 | |
| Number of page(s) | 19 | |
| Section | Galactic structure, stellar clusters and populations | |
| DOI | https://doi.org/10.1051/0004-6361/201014238 | |
| Published online | 09 December 2010 | |
A search for X-ray sources around WR 22 in the Carina region⋆
Institute of Astrophysics and Geophysics, University of Liège,
Allée du 6 août 17,
4000
Liège,
Belgium
e-mail: gosset@astro.ulg.ac.be
Received:
15
August
2006
Accepted:
1
June
2010
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.
Key words: X-rays: general / X-rays: stars / Hii regions / stars: formation
© ESO, 2010
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