Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..143m&link_type=abstract
GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 143-152 (2001).
Astronomy and Astrophysics
Astrophysics
Gamma-Ray Sources, Gamma-Ray Bursts, Jets And Bursts, Galactic Winds And Fountains
Scientific paper
We discuss several recent developments in gamma-ray burst and afterglow theory, related in particular to the interaction with the environment and how this bears on the progenitor issue. Pair production induced by the initial gamma-rays in the nearby environment will modify the initial spectrum and the afterglow light curve, and the magnitude of these changes provides a diagnostic for the external density. The illumination of the progenitor remnant and/or the surroundings by the X-ray afterglow continuum can produce substantial Fe K-alpha line and edge emission, with implications for the progenitor model. TeV neutrinos are expected to be produced both by successful (γ-ray detectable) and choked (γ-ray dark) fireball jets as they make their way out of a massive progenitor star, whose fluence is detectable with planned km3 detectors. Two mechanisms, IC and proton synchrotron, may play a role in afterglow energetics, and would have detectable signatures in the X-ray light curves as well as in the GeV range. .
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