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Eta Carinae and the Supernova Impostors pp 195–219Cite as

X-ray Variability and the Secondary Star

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Abstract

We discuss the history of X-ray observations of the η Car system, concentrating on the periodic variability discovered in the 1990s. We discuss the interpretation of these variations, concentrating on a model of the system as a “colliding-wind” binary. This interpretation allows the physical and orbital parameters of η Car and its companion star to be constrained.

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Acknowledgements

The authors would like to acknowledge many fruitful discussions with a large number of colleagues, among them Kris Davidson, Ted Gull, Roberta Humphreys, Augusto Damineli, Jean Swank, Stephen White, Julian Pittard, David Henley, Tony Moffat, Stan Owocki, John Hillier, Virpi Niemela, Nolan Walborn, and many others too numerous to fully mention. This work was supported in part by Chandra grant GO3-4008A and NASA grant NAS5-32490. This research made use of software and data available from the High Energy Astrophysics Science Archive Research Center, and NASA’s Astrophysics Data System.

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Authors and Affiliations

  1. Center for Research and Exploration in Space Science & Technology, Code 662, Goddard Space Flight Center, Greenbelt, MD, 20771, USA

    M. F. Corcoran

  2. Universities Space Research Association, 10211 Wincopin Circle, Suite 500, Columbia, MD, 21044, USA

    M. F. Corcoran

  3. Department of Physics, Nagoya University, 1 Furo-cho Chikusa-ku, Nagoya, Aichi, Japan, 464-8602

    K. Ishibashi

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Correspondence to M. F. Corcoran .

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  1. Dept. Astronomy, University of Minnesota, Church Street SE., 116, Minneapolis, 55455, Minnesota, USA

    Kris Davidson

  2. Dept. Astronomy, University of Minnesota, Church Street SE., 116, Minneapolis, 55455, Minnesota, USA

    Roberta M. Humphreys

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Corcoran, M.F., Ishibashi, K. (2012). X-ray Variability and the Secondary Star. In: Davidson, K., Humphreys, R. (eds) Eta Carinae and the Supernova Impostors. Astrophysics and Space Science Library, vol 384. Springer, Boston, MA. https://doi.org/10.1007/978-1-4614-2275-4_9

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