Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.200..151k&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 200, no. 1, p. 151-162.
Astronomy and Astrophysics
Astrophysics
5
Gamma Ray Bursts, Neutron Stars, Radiation Sources, Stellar Radiation, Sparks, Stellar Magnetic Fields, Stellar Mass Accretion
Scientific paper
We interpret the puzzling gamma-ray bursts as emitted by cooling sparks from the surface of spasmodically accreting, old neutron stars. Their spiky, anisotropic radiation is oriented with regard to the galactic disk via interstellar accretion, whose orbital angular momentum tends to counteralign with the galactic spin; in this way, larger source numbers in directions of the galactic disk are compensated by smaller beaming probabilities, resulting in a near-isotropic arrival distribution, as observed by BATSE. The source distances range between 10 and 500 pc. Their radiated energies are of order 10 exp 35 ergs, corresponding to accreted clumps (blades) of typical mass 10 exp 15 g per burst. Magnetic surface field strengths range between 10 exp 10 and 10 exp 12 G, somewhat weaker than those of newborn neutron stars.
Chang Hsiang Kuang
Kundt Wolfgang
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