The Magellanic Clouds as the source of gamma-ray bursters

Details The Magellanic Clouds as the source of gamma-ray bursters The Magellanic Clouds as the source of gamma-ray bursters

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.263...49f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 263, no. 1, p. 49-53.

Astronomy and Astrophysics

Astronomy

17

Gamma Ray Bursts, Magellanic Clouds, Neutron Stars, Pulsars, Star Distribution, Astronomical Models, Gamma Ray Astronomy, Stellar Mass Accretion, X Ray Binaries

Scientific paper

We present a new model for gamma-ray bursts to explain their isotropic but inhomogeneous space distribution. We propose that the Magellanic Clouds are the source of a special population of gamma-ray-bursting pulsars which are easily ejected from the Clouds and lead to a halo distribution which is homogeneous within a radius of about 50 kpc and falls off rapidly beyond. One way of forming pulsars with the required properties is through spin-up in massive, very luminous X-ray binaries, of which there are an exceptional number in the Clouds. If accretion in the spin-up phase causes magnetic field decay then the Clouds disperse rapidly spinning, old pulsars throughout the Galactic halo. Their sky distribution is very isotropic, but also shows some small anisotropies, in particular in the direction of the Clouds and in their orbital plane. We estimate that these anisotropies should become discernible when a few thousand bursts have been detected, and so should allow verification or refutation of the model.

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