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首页> 外文期刊>The Astrophysical journal >GAMMA-RAY BURST BEAMING: A UNIVERSAL CONFIGURATION WITH A STANDARD ENERGY RESERVOIR?
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GAMMA-RAY BURST BEAMING: A UNIVERSAL CONFIGURATION WITH A STANDARD ENERGY RESERVOIR?

机译：伽马射线爆射光束：具有标准储能的通用配置？

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摘要

We consider a gamma-ray burst (GRB) model based on an anisotropic fireball with an axisymmetric energy distribution of the form ε(θ) ∝ θ~(-k) and allow for the observer's viewing direction being at an arbitrary angle θ_v with respect to the jet axis. This model can reproduce the key features expected from the conventional on-axis uniform jet models, with the novelty being that the achromatic break time in the broadband afterglow light curves corresponds to the epoch during which the relativistic beaming angle is equal to the viewing angle, θ_v, rather than to the jet half-opening angle, θ_j. If all the GRB fireballs have such a similar energy distribution form with 1.5 < k approx< 2, then GRBs may be modeled by a quasi-universal beaming configuration and an approximately standard energy reservoir. This conclusion also holds for some other forms of angular energy distributions, such as the Gaussian function.
机译：我们考虑基于各向异性火球的γ射线猝发（GRB）模型，其轴对称能量分布形式为ε（θ）∝θ〜（-k），并且允许观察者的观看方向相对于任意角度θ_v到喷射轴。该模型可以重现传统同轴均匀射流模型所期望的关键特征，其新颖之处在于宽带余辉光曲线中的消色差时间对应于相对论光束角度等于视角的时期， θ_v，而不是射流半张角θ_j。如果所有GRB火球具有类似的能量分布形式，且1.5

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