Gamma-Ray Bursts from Neutron Star Kicks

Details Gamma-Ray Bursts from Neutron Star Kicks Gamma-Ray Bursts from Neutron Star Kicks

2003-03-17

arxiv.org/abs/astro-ph/0303365v3

Astrophys.J. 594 (2003) 919-923

Astronomy and Astrophysics

Astrophysics

12 pages, no figures, ApJ in press (minor revision with respect to Version 2)

Scientific paper

10.1086/377129

The idea that gamma-ray bursts might be a kind of phenomena associated with neutron star kicks was first proposed by Dar & Plaga (1999). Here we study this mechanism in more detail and point out that the neutron star should be a high speed one (with proper motion larger than $\sim 1000$ km/s). It is shown that the model agrees well with observations in many aspects, such as the energetics, the event rate, the collimation, the bimodal distribution of durations, the narrowly clustered intrinsic energy, and the association of gamma-ray bursts with supernovae and star forming regions. We also discuss the implications of this model on the neutron star kick mechanism, and suggest that the high kick speed were probably acquired due to the electromagnetic rocket effect of a millisecond magnetar with an off-centered magnetic dipole.

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