The young open cluster NGC 6231: five years of investigations

Details The young open cluster NGC 6231: five years of investigations The young open cluster NGC 6231: five years of investigations

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mshe.work..107s&link_type=abstract

"Proceedings of "Massive Stars and High-Energy Emission in OB Associations", a workshop of the JENAM 2005, "Distant Worlds", hel

Physics

2

Scientific paper

In this contribution, we present an overview of the main results obtained by the Liège multiwavelength (in the X-ray and optical domains) campaign on the young open cluster NGC 6231. We probe the distribution of the O star properties, and especially their binary nature. In this regard, we revise the O-type binary fraction and we briefly discuss the distribution of the binary parameters. We then present the latest developments of the canonical LX-Lbol relation. We discuss the causes of the observed deviations from this relation and of the X-ray variability among O-type stars. Probing the population of low mass pre-main sequence stars detected in the X-ray domain, we propose a scenario for the star formation history in NGC 6231.

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