X-ray confirmation of proper motion selected star clusters

Details X-ray confirmation of proper motion selected star clusters X-ray confirmation of proper motion selected star clusters

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..186z&link_type=abstract

XMM-Newton Proposal ID #06555601

Physics

Stars, White Dwarfs, Solar System, Col 106

Scientific paper

We have selected two young star clusters for X-ray imaging which nicely fit into the wide field-of-view of XMM. These two young massive clusters (age <~ 10 Myr, mass ~ 1E4 M_sun) have been identified in the ASCC-2.5 catalogue (Kharchenko 2001) providing proper motions and B,V photometry. The goal is to detect the clusters in image space (their intermediate and low-mass members, that is) in X-rays. It is only in X-rays that the young cluster members stand out against the background field contamination, while they are drowned in optical and infrared observations. Their detection would silence major criticism that has been raised against the method of determining young cluster masses by fitting King profiles, independent of cluster luminosity.

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