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星期五, 二月 07, 2014

Kelner 2013 外康普顿散射的一般公式

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Title:
The beaming pattern of External Compton Emission from relativistic outflows
Authors:
Kelner, S. R.; Lefa, E.; Rieger, F. M.; Aharonian, F. A.
Publication:
eprint arXiv:1308.5157
Publication Date:
08/2013
Origin:
ARXIV
Keywords:
Astrophysics - High Energy Astrophysical Phenomena
Comment:
7 pages, 2 figures
Bibliographic Code:
2013arXiv1308.5157K

Abstract

The beaming pattern of radiation emitted by a relativistically moving source like jets in microquasars, AGN and GRBs, is a key issue for understanding of acceleration and radiation processes in these objects. In this paper we introduce a formalism based on a solution of the photon transfer equation to study the beaming patterns for emission produced by electrons accelerated in the jet and upscattering photons of low-energy radiation fields of external origin (the so-called External Compton scenario). The formalism allows us to treat non-stationary, non-homogeneous and anisotropic distributions of electrons, but assuming homogeneous/isotropic and non-variable target photon fields. We demonstrate the non-negligible impact of the anisotropy in the electron distribution on angular and spectral characteristics of the EC radiation.

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