Re-ignition of dead pulsars by passages of interstellar comets through the magnetosphere - Possible nature of cosmic gamma-ray bursts

Details Re-ignition of dead pulsars by passages of interstellar comets through the magnetosphere - Possible nature of cosmic gamma-ray bursts Re-ignition of dead pulsars by passages of interstellar comets through the magnetosphere - Possible nature of cosmic gamma-ray bursts

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.165..137m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 165, no. 1, March 1990, p. 137-145.

Astronomy and Astrophysics

Astrophysics

4

Comets, Cosmic Rays, Gamma Ray Bursts, Neutron Stars, Pulsar Magnetospheres, Asteroids, Astronomical Models, Stellar Evolution, Stellar Rotation

Scientific paper

In a recent paper by Ruderman and Cheng (1988) a general scenario of radio pulsars evolution has been proposed which explains jointly all galactical classes of neutron stars (NSs) radiating gamma-rays. This scheme associates cosmic gamma-ray bursts (GRBs) with electromagnetic cascades in magnetosphere of dead pulsars. Due to reignition processes in outer gaps, rotation energy of the NS was thought to convert to gamma-rays, but possible 'matches' for reignition have not been pointed out. The passage of interstellar comet through the magnetosphere of 'dead' pulsars is proposed below as a possible initiator of the GRBs. Values of the main parameters of the model (period of the NS rotation, concentration of interstellar comets and fraction of bursting NSs) are estimated, thus allowing general characteristics of the phenomenon of the GRBs to be explained.

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