[en] We have combined 22 deep Chandra ACIS-I pointings to map over one square degree of the Carina complex. Our x-ray survey detects 69 of 70 known O-type stars and 61 of 130 known early B stars. The majority of single O stars display soft X-ray spectra and have a mean log L[SUB]X[/SUB]/L[SUB]bol[/SUB] ~ -7.5 suggesting shocks embedded in the O-star winds. Over OB stars show unusually high X-ray luminosities, high shock temperatures or time variability, not predicted for embedded wind shocks.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gagné, Marc; Dept. of Geology and Astronomy, West Chester Univ., West Chester, PA 19383
Fehon, Garrett; Dept. of Geology and Astronomy, West Chester Univ., West Chester, PA 19383
Savoy, Michael R; Dept. of Geology and Astronomy, West Chester Univ., West Chester, PA 19383
Cohen, David H; Dept. of Physics and Astronomy, Swarthmore College, Swarthmore, PA 19081
Townsley, Leisa K; Dept. of Astronomy & Astrophysics, Penn State Univ., University Park, PA 16802
Broos, Patrick S; Dept. of Astronomy & Astrophysics, Penn State Univ., University Park, PA 16802
Povich, Matthew S; Dept. of Astronomy & Astrophysics, Penn State Univ., University Park, PA 16802
Corcoran, Michael F; CRESST and X-ray Astrophysics Laboratory, NASA/GSFC, Greenbelt, MD 20771
Walborn, Nolan R; Space Telescope Science Institute, Baltimore, MD 21218, USA
Moffat, Anthony F J; Dépt. de Physique, Univ. de Montréal, Succ. Centre-Ville, Montréal, QC, H3C 3J7, Canada
Nazé, Yaël ; GAPHE, Dépt. AGO, Univ. Liège, Allée du 6 Août 17, Bat. B5C, B4000-Liège, Belgium
Oskinova, Lidia M; Institute for Physics and Astronomy, Univ. of Potsdam, 14476 Potsdam, Germany
Language :
English
Title :
The Chandra survey of Carina OB stars
Publication date :
01 July 2011
Event name :
IAU Symposium no. 272
Event date :
19-23 July 2010
Audience :
International
Main work title :
Active OB stars: structure, evolution, mass loss and critical limits
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Bibliography
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Gagné, M., Oksala, M. E., Cohen, D. H., Tonnesen, S. K. et al. 2005, ApJ, 628, 986
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