The Source of Anomalously Hard X-Rays in M17's Central 04+04 Binary

Details The Source of Anomalously Hard X-Rays in M17's Central 04+04 Binary The Source of Anomalously Hard X-Rays in M17's Central 04+04 Binary

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541907m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #419.07; Bulletin of the American Astronomical Society, Vol. 42, p.277

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Scientific paper

The 60 solar mass O4+O4 binary known as Kleinmann's Anonymous Star, or CEN 1, is the principal source of the X-ray emission in M17. Past Chandra CCD observations resolve the two components, A and B, with a separation of 1.8''. Both of the components are peculiarly strong and hard X-ray sources, though B (Lx 2*1033 erg s-1, hard temperature component 9.9 keV) is more exceptional than A (Lx 1033 erg s-1, hard temperature component 3.2 keV). Two scenarios explain the observed excess emission. The first is that the excess could be due to magnetic channeling of the strong stellar wind, as in theta1 Ori C. The other possibility is that both A and B are colliding wind binaries. We report here on a new 150 ks Chandra grating observation of CEN 1. Initial analysis of Doppler broadened line widths and f/i line ratios favor the colliding wind binary hypothesis - CEN 1 is at least a quadruple system of two binaries.

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