Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...455..252h&link_type=abstract
Astrophysical Journal v.455, p.252
Astronomy and Astrophysics
Astronomy
59
Stars: Binaries: General, Celestial Mechanics, Stellar Dynamics, Stars: Circumstellar Matter, Stars: Formation
Scientific paper
The disruption of a circumstellar disk during a stellar encounter and the accompanying dissipation of orbital energy are numerically simulated. It is found that an average impacting encounter produces a mass loss of less than about half of the initial disk mass. Even in dense stellar environments encounters are unlikely to play a prominent role in dispersing disks, though densities in the outer parts can be significantly reduced. A large fraction of the disk material may be captured by the perturber or ejected from the system. No material is found to form a circumbinary disk.
Though the planar retrograde encounters are found to be particularly efficient at dissipating orbital energy, estimated rates indicate that capture is not a dominant process for the formation of binaries in stellar clusters. However, the rates may be greatly underestimated if substructure exists or interactions occur during the star-formation process.
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