COUP census of X-ray stars in BN-KL and OMC-1S

Details COUP census of X-ray stars in BN-KL and OMC-1S COUP census of X-ray stars in BN-KL and OMC-1S

2005-04-08

arxiv.org/abs/astro-ph/0504204v1

Astronomy and Astrophysics

Astrophysics

57 pages and 18 Figures. Accepted for publication by ApJS (COUP special issue). Preprint with higher resolution figures is ava

Scientific paper

We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 (OMC-1) behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10 days) exposure of the Chandra Orion Ultradeep Project (COUP). We focus on a 40"*50" region around the Becklin-Neugebauer object and Kleinmann-Low nebula (collectively BN-KL) and a 60"*75" region around OMC-1S, a secondary star-forming peak some 90" south of BN-KL. Forty-three and sixty X-ray sources were detected in BN-KL and OMC-1S, respectively, of which half and one-third, respectively, were found to be foreground members of the ONC, while the remaining sources are identified as obscured X-ray sources with column densities 22

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