Monte Carlo simulations of the supernova ejection mechanism for the runaway stars
- Los Alamos National Lab., NM (United States)
- Jet Propulsion Lab., Pasadena, CA (United States)
Monte Carlo simulations of supernova explosions in a realistic population of binary systems have been carried out for the purpose of studying the production of runaway stars. Contrary to previous studies, we find that the lowest mass runaways attain the highest velocities, and that there is no low-mass cutoff in the mass spectrum of the runaways. The vast majority of runaways with masses {ge} 5 M{circle_dot} have velocities < 200 km s{sup {minus}1}. An asymmetric kick during the explosion of 100--200 km s{sup {minus}1} is not enough to disrupt most of the binary systems; thus the majority of the runaways are expected to possess neutron star companions. For runaways with velocities > 50 km s{sup {minus}1}, most of these companions will be in eccentric orbits with periods < 10 days. Only {approx_equal} 1% of the supernova-ejected runaways should be normal binaries consisting of main-sequence stars. Such binaries axe produced when the distant component of a dose triple system is the first star to explode. Finally, only one 0-type runaway with a velocity {ge} 50 km s{sub {minus}1} is produced by every 10 to 15 binaries with O-type primaries, and thus the supernova ejection mechanism predicts that < 10% of all 0-type stars should be runaways.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10167695
- Report Number(s):
- LA-UR-92-2218; CONF-9205226-2; ON: DE92018367
- Resource Relation:
- Conference: Conference on luminous high-latitude stars,Boston, MA (United States),28-30 May 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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