Two populations of gamma-ray bursts: A solution to the BATSE conundrum

Details Two populations of gamma-ray bursts: A solution to the BATSE conundrum Two populations of gamma-ray bursts: A solution to the BATSE conundrum

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..265..130l&link_type=abstract

Gamma-ray bursts. AIP Conference Proceedings, Volume 265, pp. 130-134 (1991).

Physics

1

Gamma-Ray Sources, Gamma-Ray Bursts, Neutron Stars

Scientific paper

BATSE measurements suggest1 that the distribution of gamma-ray burst sources is spatially nonuniform, but as yet shows no discernible anisotropy. This is not consistent with the distribution expected solely from a local galactic population of neutron star sources. We suggest, however, that the inconsistency can be reconciled if there are at least two distinct classes of bursts, both of which originate on galactic neutron stars, but which differ by a factor of 104 or more, in mean luminosity. We show, as an example, that the observed V/Vmax distributions and anisotropy constraints of gamma-ray bursts are consistent with those expected from a combination of two such classes, resulting from different burst mechanisms on a single galactic, high-velocity, neutron star population.

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