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Interaction between the Be star and the compact companion in TeV γ-ray binaries

  • Atsuo T. Okazaki (a1), Shigehiro Nagataki (a2), Tsuguya Naito (a3), Akiko Kawachi (a4), Kimitake Hayasaki (a5), Stanley P. Owocki (a6) and Jumpei Takata (a7)...
Abstract

We report on the results from 3-D SPH simulations of TeV binaries with Be stars. Since there is only one TeV binary (B 1259-63) where the nature of the compact companion has been established, we mainly focus on this Be-pulsar system. From simulations of B 1259-63 around periastron, we find that the pulsar wind dominates the Be-star wind and strips off an outer part of the Be-star disk, causing a strongly asymmetric, phase-dependent structure of the circumstellar material around the Be star. Such a large modulation may be detected by optical, IR, and/or UV observations at phases near periastron. We also discuss the results from simulations of another TeV binary LS I+61 303, for which the nature of the compact object is not yet known.

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References
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Dubus, G. 2006, A&A, 456, 801
Romero, G. E., Okazaki, A. T., Orellana, M., & Owocki, S. P. 2007, A&A, 474, 15
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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