Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...392l...9d&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. L9-L13. Research supported by NSERC
Astronomy and Astrophysics
Astrophysics
1020
Dynamo Theory, Gamma Ray Bursts, Neutron Stars, Star Formation, Stellar Magnetic Fields, Gravitational Collapse, Stellar Rotation, Supernovae
Scientific paper
It is proposed that the main observational signature of magnetars, high-field neutron stars, is gamma-ray bursts powered by their vast reservoirs of magnetic energy. If they acquire large recoils, most magnetars are unbound from the Galaxy or reside in an extended, weakly bound Galactic corona. There is evidence that the soft gamma repeaters are young magnetars. It is argued that a convective dynamo can also generate a very strong dipole field after the merger of a neutron star binary, but only if the merged star survives for as long as about 10-100 ms. Several mechanisms which could impart a large recoil to these stars at birth, sufficient to escape from the Galactic disk, are discussed.
Duncan Robert C.
Thompson Christopher
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