Panaitescu 2008 Bulk-scattering 作为早期X射线耀发和色差平降的机制

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· arXiv e-print (arXiv:0802.1235)

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Title:		Direct and bulk-scattered forward-shock emissions: sources of X-ray afterglow diversity
Authors:		Panaitescu, A.
Publication:		eprint arXiv:0802.1235
Publication Date:		02/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		6 pages, submitted to the proceedings of 2007 GRB meeting, Santa Fe, NM, Nov 5-9 2007
Bibliographic Code:		2008arXiv0802.1235P

Abstract

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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