Shading and Smothering of Gamma Ray Bursts

Details Shading and Smothering of Gamma Ray Bursts Shading and Smothering of Gamma Ray Bursts

1998-12-06

arxiv.org/abs/astro-ph/9812113v1

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures, submitted to ApJL

Scientific paper

10.1086/312187

The gamma ray burst (GRB) 980425 is distinctive in that it seems to be associated with supernova (SN) 1998bw, has no X-ray afterglow, and has a single peak light curve and a soft spectrum. The supernova is itself unusual in that its expansion velocity exceeds c/6. We suggest that many of these features can be accounted for with the hypothesis that we observe the GRB along a penumbral line of sight that contains mainly photons that have scattered off ejected baryons. The hypothesis suggests a baryon poor jet (BPJ) existing within a baryon rich outflow. The sharp distinction can be attributed to whether or not the magnetic field lines thread an event horizon. Such a configuration suggests that there will be some non-thermal acceleration of pick-up ex-neutrons within the BPJ. This scenario might produce observable spallation products and neutrinos.

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