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A stellar fly-by simulation giving β Pic's disc asymmetries

  • John Larwood (a1) and Paul Kalas (a2)

Abstract

We have numerically investigated the dynamics of how a close stellar fly-by encounter of a symmetrical circumstellar planetesimal disc can give rise to the many kinds of asymmetries and substructures attributed to the dusty disc of β Pic. We find three recognizable groupings of test particles that can be related to the morphology of the β Pic disc. These are: highly eccentric and inclined orbit particles that reach apocentre in the southwest, moderately eccentric and inclined orbit particles that reach apocentre in the northeast, and a relatively unperturbed region inside ∽200 AU radius.

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References

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Burrows, C. J., Krist, J. E., & Stapelfeldt, K. R. 1995, BAAS, 187, 32.
Kalas, P., Deltorn, J. M., & Larwood, J. 2001, ApJ, in press.
Kalas, P., & Jewitt, D. 1995, AJ, 110, 794.
Kalas, P., Larwood, J., Smith, B. A., & Shultz, A. 2000, ApJ, 530, L133.
Larwood, J. D., & Kalas, P. G. 2001, MNRAS, in press.
Mouillet, D., Larwood, J. D., Papaloizou, J. C. B., & Lagrange, A. M. 1997, MNRAS, 292, 896.
Smith, B. A., & Terrile, R. J. 1984, Science, 226, 1421.
Smith, B. A., & Terrile, R. J. 1987, BAAS, 19, 829.

A stellar fly-by simulation giving β Pic's disc asymmetries

  • John Larwood (a1) and Paul Kalas (a2)

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