On the origin of hyperfast neutron stars

Abstract

We propose an explanation for the origin of hyperfast neutron stars (e.g. PSR B1508+55, PSR B2224+65, RX J0822-4300) based on the hypothesis that they could be the remnants of a symmetric supernova explosion of a high-velocity massive star (or its helium core) which attained its peculiar velocity (similar to that of the neutron star) in the course of a strong three- or four-body dynamical encounter in the core of a young massive star cluster. This hypothesis implies that the dense cores of star clusters (located either in the Galactic disk or near the Galactic centre) could also produce the so-called hypervelocity stars -- the ordinary stars moving with a speed of ~1000 km/s.

2 pages, to appear in Dynamical Evolution of Dense Stellar Systems, Proceed. of the IAU Symp. 246 (Capri, Sept. 2007), eds. E.Vesperini, M. Giersz, and A. Sills

References in corpus (9)

• The runaway growth of intermediate-mass black holes in dense star clusters
• Ejection of hypervelocity stars by the (binary) black hole(s) in the Galactic center
• Discovery of an Unbound Hyper-Velocity Star in the Milky Way Halo
• HE 0437-5439 -- an unbound hyper-velocity main-sequence B-type star
• Getting Its Kicks: A VLBA Parallax for the Hyperfast Pulsar B1508+55
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• Three-body encounters in the Galactic centre: the origin of the hypervelocity star SDSS J090745.0+024507
• Hypervelocity Stars II. The Bound Population
• Smashing the Guitar: An Evolving Neutron Star Bow Shock