Statistics – Computation
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..222l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, July 1988, p. 222-232. NSERC-supported research.
Statistics
Computation
99
Binary Stars, Early Stars, Open Clusters, Star Formation, Stellar Motions, B Stars, Computational Astrophysics, O Stars
Scientific paper
The production of runaway stars by the dynamical-ejection mechanism in an open star cluster containing 50 percent binaries of equal mass and energy is investigated theoretically by means of numerical simulations using the NBODY5 code of Aarseth (1985). The construction of the models is outlined, and the results are presented graphically and characterized in detail. It is shown that binary-binary collisions capable of producing runaways can occur (via formation and disruption, with some stellar collisions, of hierarchical double binaries) in clusters of relatively low density (e.g., pc-sized clusters of O or B stars). The frequency of binaries in the runaway population is found to vary between 0 and 50 percent, with the majority of runaways being unevolved early-type stars.
Duncan Martin J.
Leonard Peter J. T.
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