On the origin of the OB runaway stars

Details On the origin of the OB runaway stars On the origin of the OB runaway stars

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jrasc..84..216l&link_type=abstract

Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 84, June 1990, p. 216-227. Research supported by the

Astronomy and Astrophysics

Astronomy

2

B Stars, O Stars, Stellar Mass Ejection, Stellar Models, Many Body Problem, Star Distribution, Supernovae

Scientific paper

The theories for the origin of the OB runaway stars are reviewed. The shortcomings of the supernova ejection hypotheses are described, and the advantages of the dynamical ejection hypothesis are discussed. N-body simulations and binary-binary scattering experiments have been performed in order to obtain predictions regarding the maximum ejection velocity, the binary frequency and the mass-velocity relation of dynamically-ejected runaways. These predictions are in excellent agreement with the observed properties of the OB runaway stars. Also, the observed surface density of runaways in the Galactic disk appears to be consistent with dynamical ejection. In conclusion, dynamical ejection can explain the OB runaway stars.

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