On the origin of hyperfast neutron stars

Details On the origin of hyperfast neutron stars On the origin of hyperfast neutron stars

2007-12-27

arxiv.org/abs/0712.4230v1

IAU Symp. 246 (2008) 365-366

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1017/S1743921308015962

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.

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