Are galactic GRB models still an option? |
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| Authors: | D H Hartmann M S Briggs G N Pendleton J Hakkila |
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| Institution: | (1) Department of Physics and Astronomy, Clemson University, 29634 Clemson, SC, USA;(2) Department of Physics, University of Alabama, 35899 Huntsville, AL, USA;(3) Department of Physics and Astronomy, Mankato State University, 56002 Mankato, MN, USA |
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| Abstract: | The traditional paradigm of a Galactic origin of gamma-ray bursts (GRBs) suffered a major reduction in popularity when BATSE revealed an isotropic but radially inhomogeneous distribution of GRBs. The lack of pronounced galactic anisotropies places severe constraints on models including significant source contributions from the usual disk, bulge, or halo components of the Milky Way. Although models can be designed to preserve the local disk origin, a perhaps more promising approach invokes a very extended Galactic halo. Populating such halos with neutron stars requires very high velocities. Injection of such neutron stars might be restricted to a phase of the early galaxy, or it may continue to the present. We discuss several observational constraints that address the question presented in the title. |
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