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Issue A&A
Volume 407, Number 3, September I 2003
Page(s) 925 - 934
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20030910



A&A 407, 925-934 (2003)
DOI: 10.1051/0004-6361:20030910

An XMM-Newton observation of the very young open cluster NGC 6383

G. Rauw1, M. De Becker1, E. Gosset1 and I. R. Stevens2

1  Institut d'Astrophysique, Université de Liège, Allée du 6 Août, Bât. B5c, 4000 Liège (Sart Tilman), Belgium
2  School of Physics & Astronomy, University of Birmingham, Edgbaston Birmingham B15 2TT, UK

(Received 13 February 2003 / Accepted 16 June 2003)

Abstract
We report the detection of a number of X-ray sources associated with the very young open cluster NGC 6383. About two thirds of these objects are correlated with a rather faint optical source and all but one have at least one infrared counterpart within a correlation radius of 8 arcsec. Although NGC 6383 is not associated with a prominent star forming region, the overall properties of many of the X-ray sources suggest that they may be candidates for low-mass pre-main sequence stars. The number of X-ray sources increases towards the cluster center suggesting that there exists a close relation between the massive O-star binary system HD 159 176 in the cluster core and the population of X-ray bright low-mass objects in NGC 6383.


Key words: stars: pre-main sequence -- X-rays: stars -- open clusters and associations: individual: NGC 6383 -- stars: early-type

Offprint request: G. Rauw, rauw@astro.ulg.ac.be

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© ESO 2003


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