Astrophys. J., Suppl. Ser., 194, 3 (2011/May-0)
Source contamination in X-ray studies of star-forming regions: application to the Chandra Carina Complex Project.
GETMAN K.V., BROOS P.S., FEIGELSON E.D., TOWNSLEY L.K., POVICH M.S., GARMIRE G.P., MONTMERLE T., YONEKURA Y. and FUKUI Y.
Abstract (from CDS):
We describe detailed simulations of X-ray-emitting populations to evaluate the levels of contamination by both Galactic and extragalactic X-ray sources unrelated to a star-forming region under study. For Galactic contaminations, we consider contribution from main-sequence stars and giants (not including cataclysmic variables and other classes of accretion-driven X-ray binary systems), as they make the dominant contribution at the position of the Carina Nebula. The simulations take into consideration a variety of technical factors involving a Galactic population synthesis model, stellar X-ray luminosity functions, Chandra telescope response, source detection methodology, and possible spatial variations in the X-ray background and absorption through molecular clouds. When applied to the 1.42 deg2 field of the Chandra Carina Complex Project (CCCP), the simulations predict ∼5000 contaminating sources (1 source/arcmin2 of the survey), evenly distributed across the field. The results of the simulations are further employed in a companion CCCP study to assign membership probabilities to individual sources.
Galaxy: disk - ISM: individual: Carina - open clusters and associations: individual: Carina - stars: formation - stars: pre-main sequence - X-rays: stars
Status at CDS:
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