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The Chandra survey of Carina OB stars

  • Marc Gagné (a1), Garrett Fehon (a1), Michael R. Savoy (a1), David H. Cohen (a2), Leisa K. Townsley (a3), Patrick S. Broos (a3), Matthew S. Povich (a3), Michael F. Corcoran (a4), Nolan R. Walborn (a5), Anthony F.J. Moffat (a6), Yael Nazé (a7) and Lidia M. Oskinova (a8)...

Abstract

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 LX/Lbol ≈ −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.

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References

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Antokhin, I. I., Rauw, G., Vreux, J.-M., van der Hucht, K. A. et al. 2008, A&A, 477, 593
Gagné, M., Oksala, M. E., Cohen, D. H., Tonnesen, S. K. et al. 2005, ApJ, 628, 986
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The Chandra survey of Carina OB stars

  • Marc Gagné (a1), Garrett Fehon (a1), Michael R. Savoy (a1), David H. Cohen (a2), Leisa K. Townsley (a3), Patrick S. Broos (a3), Matthew S. Povich (a3), Michael F. Corcoran (a4), Nolan R. Walborn (a5), Anthony F.J. Moffat (a6), Yael Nazé (a7) and Lidia M. Oskinova (a8)...

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