0000000000975120

AUTHOR

D. Giannios

showing 4 related works from this author

Gamma-ray burst afterglow light curves from realistic density profiles

2011

Monthly Notices of the Royal Astronomical Society, 418, 583, (2011)
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Radio Afterglow of the Jetted Tidal Disruption Event Swift J1644+57

2012

EPJ Web of Conferences, 39, id.04001 (2012)
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Radio Afterglow of the Jetted Tidal Disruption Event Swift J1644+57

2013

EAS Publications Series, 61, 165 (2013)
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On the existence of a reverse shock in magnetized GRB ejecta

2007

The role of magnetic fields in gamma-ray burst (GRB) flows remains controversial. The study of the early afterglow phases and, in particular, of the reverse shock dynamics and associated emission offers a promising probe of the magnetization of the ejecta. In this paper, we derive the conditions for the existence of a reverse shock in arbitrarily magnetized ejecta that decelerate and interact with the circumburst medium. Both constant and wind-like density profiles are considered. We show, in contrast to previous estimates, that ejecta with magnetization larger than unity are not crossed by a reverse shock for a large fraction of the parameter space relevant to GRB flows. Allowing for shell…

Astrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstrophysicsAstrophysics::Galaxy Astrophysics
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