Gamma-ray burst afterglows from decelerating material: blast waves and plasmoids

Details Gamma-ray burst afterglows from decelerating material: blast waves and plasmoids Gamma-ray burst afterglows from decelerating material: blast waves and plasmoids

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..69..699c&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 69, Issue 1-3, p. 699-702.

Physics

Nuclear Physics

Scientific paper

We examine the dynamics and emitted radiation from material with a large initial bulk Lorentz factor which decelerates as it sweeps up ambient matter. The bulk kinetic energy of the material is converted into non-thermal energy of electrons which radiate isotropically in the locally co-moving frame. Self-consistent solutions for the dynamica of the material are computed which account for changes in its bulk relativistic inertia due to accretion and the emitted radiation. Fully radiative and non-radiative solutions are shown to be limiting cases agreeing with standard solutions for spherically expanding blast waves. We have calculated the afterglow synchrotron emission for a variety of parameters and geometries, and we compare a fiducial example to the afterglow behavior observed from recent gamma-ray burst X-ray and optical counterparts.

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