Planets in 47 Tuc |
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| Authors: | Melvyn B Davies Steinn Sigurdsson |
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| Institution: | ;1Department of Physics &Astronomy, University of Leicester, Leicester LE1 7RH;2Astronomy Department, Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | We consider the survivability of planetary systems in the globular cluster 47 Tucanae. We compute the cross-sections for the breakup of planetary systems via encounters with single stars and binaries. We also compute the cross-sections to leave planets on eccentric orbits. We find that wider planetary systems ( d ?0.3 au) are likely to be broken up in the central regions of 47 Tucanae (within the half-mass radius of the cluster). However, tighter systems and those in less-dense regions may survive. Tight systems will certainly survive in less-dense clusters where subsequent surveys should be conducted. |
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| Keywords: | stellar dynamics stars: evolution planetary systems globular clusters: general globular clusters: individual: 47 Tuc |
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