Computer Science
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..366..263w&link_type=abstract
High velocity neutron stars and gamma-ray bursts. AIP Conference Proceedings, Volume 366, pp. 263-268 (1996).
Computer Science
1
Gamma-Ray Sources, Gamma-Ray Bursts, Neutron Stars
Scientific paper
When a neutron star is born with a large ``kick,'' it overtakes and captures a portion of its own ejecta. Especially in massive stars, material in the immediate vicinity of the neutron star has been decelerated by hydrodynamic interaction with the stellar mantle. This material is clumpy owing to an ongoing Rayleigh-Taylor instability. Capture of a clump provides the neutron star with an accretion disk of mass M~10-4Msolar and specific angular momentum ~1020 erg s. Magnetic interaction with the inner part of this disk slows the rotation of the neutron star while the outer part forms planetesimals, chiefly composed of silicates, at ~1013 cm. Accretion of these planetesimals, could in principle give rise to gamma-ray bursts, but there is a severe problem with tidal disruption in the accretion process for all but the smallest impact parameters. Unless the gamma-ray burst is focused into a small solid angle, the model is too inefficient. More likely it gives rise to many faint hard x-ray transients.
Herant Marc
Woosley Stan E.
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