Petropoulou 2011 用电子最大洛仑兹因子取小值来解释X射线的平降

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Title:		Effects of a low electron distribution cutoff on multiwavelength spectra and light curves of GRB afterglows
Authors:		Petropoulou, M.; Mastichiadis, A.; Piran, T.
Affiliation:		AA(Department of Physics, University of Athens, Panepistimiopolis, 15783, Zografos, Greecemaroulaaki@gmail.com), AB(Department of Physics, University of Athens, Panepistimiopolis, 15783, Zografos, Greece), AC(The Racah Institute of Physics, The Hebrew University, Jerusalem, Israel)
Publication:		Astronomy & Astrophysics, Volume 531, id.A76 (A&A Homepage)
Publication Date:		07/2011
Origin:		EDP Sciences
Keywords:		gamma-rays: general, acceleration of particles, radiation mechanisms: non-thermal
DOI:		10.1051/0004-6361/201016088
Bibliographic Code:		2011A&A...531A..76P

Abstract

Aims: We investigate the behavior of the frequency-centered light curves expected within the standard model of gamma ray bursts, allowing the maximum electron energy (γ_max) to be a free parameter that may take low values.
Methods: We solve the spatially averaged kinetic equations that describe the simultaneous evolution of particles and photons, obtaining the multi-wavelength spectra as a function of time. From these we construct the frequency-centered light curves with an emphasis on the X-ray and optical bands.
Results: We show that in cases where γ_max takes low values, the produced X-ray light curves show a plateau as the synchrotron component gives its place to the synchrotron self-Compton one in the X-ray band.

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