Chandra Observations of OB stars in the Cygnus OB2 Association

Details Chandra Observations of OB stars in the Cygnus OB2 Association Chandra Observations of OB stars in the Cygnus OB2 Association

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..361..530y&link_type=abstract

Active OB-Stars: Laboratories for Stellar and Circumstellar Physics, ASP Conference Series, Vol. 361, Proceedings of the confere

Physics

Scientific paper

A report is made on the analysis of two Chandra archival data of the Cygnus OB2 association, which is one of the nearest (˜ 1.7 kpc) massive star forming regions. Using the wavdetect tool, 559 and 171 X-ray sources were detected. Among them, two sources show hard spectra which are represented by powerlaw of photon index ˜ 1.2 or thin thermal plasma emission of kT ˜ 10 keV. They do not have counterparts in other wavelengths, and one of them is located in the center of three possible OB stars, arranged in a triangle with a separation of ˜ 0.05 pc. This suggests that the X-ray emission of this particular object is powered by a collision among winds from the three stars.

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