Direct and bulk-scattered forward-shock emissions: sources of X-ray afterglow diversity

Details Direct and bulk-scattered forward-shock emissions: sources of X-ray afterglow diversity Direct and bulk-scattered forward-shock emissions: sources of X-ray afterglow diversity

2008-02-09

arxiv.org/abs/0802.1235v1

AIP Conf.Proc.1000:433-438,2008

Astronomy and Astrophysics

Astrophysics

6 pages, submitted to the proceedings of 2007 GRB meeting, Santa Fe, NM, Nov 5-9 2007

Scientific paper

10.1063/1.2943502

I describe the modifications to the standard forward-shock model required to account for the X-ray light-curve features discovered by Swift in the early afterglow emission and propose that a delayed, pair-enriched, and highly relativistic outflow, which bulk-scatters the forward-shock synchrotron emission, yields sometimes a brighter X-ray emission, producing short-lived X-ray flares, X-ray light-curve plateaus ending with chromatic breaks, and fast post-plateau X-ray decays.

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