Runaway stars from young star clusters containing initial binaries. I. Equal-mass, equal-energy binaries

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114804· OSTI ID:6921228

Leonard, P J.T.; Duncan, M J

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. 38 references.

• Research Organization: Toronto Univ. (Canada); Lick Observatory, Santa Cruz, CA (USA)
• OSTI ID: 6921228
• Journal Information: Astron. J.; (United States), Vol. 96
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STARS
ORIGIN
BINARY STARS
COLLISIONS
COMPUTERIZED SIMULATION
GRAVITATIONAL INTERACTIONS
MASS
N CODES
STAR CLUSTERS
STAR EVOLUTION
VELOCITY
BASIC INTERACTIONS
COMPUTER CODES
INTERACTIONS
SIMULATION
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
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