A test of the galactic origin of gamma-ray bursts
- Princeton Univ. Observatory, NJ (USA)
Models in which gamma-ray bursters are young neutron stars may be difficult to reconcile with the apparently isotropic distribution of observed bursts. To justify this statement, the distribution of old neutron stars in the Galaxy was calculated by integrating numerically some 90,000 orbits in the Galactic gravitational potential for up to 10 to the 10th yr. Other calculations included the dipole moment in the angular distribution of neutron stars as a convenient measure of their concentration toward the Galactic center, the quadrupole moment in their angular distribution as a convenient measure of their concentration toward the Galactic plane, and the average value of V/Vmax as a convenient measure of the radial distribution of neutron stars. Models that require accretion from a cold circumstellar disk or from a close companion are only marginally consistent with the isotropic distribution of the observed bursts. Models that require accretion of interstellar matter are ruled out due to a very strong dipole anisotropy. Models that suggest the Galactic halo origin of gamma-ray bursts are briefly discussed. The GRANAT and GRO missions should provide evidence for or against the association of gamma-ray bursts with the Galactic disk neutron stars. 36 refs.
- OSTI ID:
- 7164040
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 348; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Feeding a gamma-ray burster
The halo beaming model for gamma-ray bursts
Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCRETION DISKS
COSMIC GAMMA BURSTS
COSMIC RADIATION
DISTRIBUTION
GALAXIES
INTERSTELLAR SPACE
IONIZING RADIATIONS
MATHEMATICAL MODELS
MILKY WAY
NEUTRON STARS
ORIGIN
PRIMARY COSMIC RADIATION
RADIATIONS
SPACE
SPATIAL DISTRIBUTION
STAR ACCRETION
STAR EVOLUTION
STARS