X-ray Sources in the Rich Open Cluster NGC 6819

Details X-ray Sources in the Rich Open Cluster NGC 6819 X-ray Sources in the Rich Open Cluster NGC 6819

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe.112g&link_type=abstract

Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo

Physics

Stars And Star Formation

Scientific paper

We present the first study of the X-ray population of the intermediate-age rich open cluster NGC 6819, using the XMM-Newton Observatory. In the past decade, Chandra X-ray observations have shown a relationship between the X-ray population of globular clusters and their internal dynamics and encounter frequency. We will investigate whether a similar link exists in open clusters, utilizing X-ray and UV data from XMM-Newton along with the wealth of photometry and radial velocity data from the WIYN Open Cluster Study (WOCS). These preliminary results for the X-ray sources in NGC 6819 are the first in a group of 8 open clusters spanning a range of age and metallicities. We detect 76 X-ray sources in the field of NGC 6819 down to a luminosity of 10^{30} ergs/s for cluster members. Sources are classified by taking into account their broadband X-ray/UV/optical spectral properties, determining what types of X-ray sources have formed in NGC 6819 and ultimately whether or not they are primordial or linked to dynamics.

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