Relativistic motion in gamma-ray bursts
Relativistic motion in gamma-ray bursts
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DOI：
10.1086/170048
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发表时间：
1991-05
期刊：
影响因子：
--
通讯作者：
J. Krolik;E. Pier
中科院分区：
文献类型：
--
作者：
J. Krolik;E. Pier
三个基本问题困扰着γ射线暴模型：能量来源；高能光子逃离辐射区域的能力；以及x射线发射的相对弱点。γ射线发射等离子体的相对论体运动是解决这三个问题的自然方法。它的作用可以用三个参数来概括：α，高能光子数谱的幂律指数；γ，体积流的洛伦兹因子；δ = 1/[γ(1-βμ *)]，其中μ *是我们的视角相对于气流方向的余弦。
Three fundamental problems beset models of γ-ray bursts : the energy source ; the ability of high-energy photons to escape the radiation region ; and the comparative weakness of X-ray emission. Relativistic bulk motion of the γ-ray-emitting plasma is a natural solution to all three problems. Its effect can be concisely summarized in terms of three parameters : α, the power-law index of the high-energy photon number spectrum ; γ, the Lorentz factor of the bulk flow ; and δ = 1/[γ(1-βμ * )], where μ * is the cosine of our viewing angle with respect to the direction of the flow.