X-ray Sources in the Rich Open Cluster NGC 6819

Type Conference Paper
Names Natalie Gosnell, P. Frinchaboy, A. Geller, J. Kalirai, R. Mathieu, D. Pooley, E. Ramirez-Ruiz
Conference Name Chandra's First Decade of Discovery
Pages 112
Date September 1, 2009
URL http://adsabs.harvard.edu/abs/2009cfdd.confE.112G
Library Catalog NASA ADS
Abstract 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.
Tags Stars and Star Formation
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