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arXiv 0811.2466astro-ph
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来自LS I +61 303的gamma-ray排放:基本系统不确定性的影响

gamma-ray emission from LS I +61 303: The impact of basic system uncertainties

Agnieszka Sierpowska-Bartosik, Diego F. Torres

摘要:

LS I +61 303最近被主要大气成像切伦科夫望远镜探测到为周期性伽马射线源。一个独特的轨道相关的$γ$射线的发射found.This工作表明,范围内的不确定性,但在手头的轨道要素的双系统LSI以及在可能的假设上的恒星风的光学伴星发挥不可忽视的作用,在计算的不透明度,以高能量的过程,导致$γ$射线的预测。探讨了几何结构对$γ$射线光子的传播和逃逸的影响。有了这项研究在手,我们分析了脉冲星风区模型的伽马射线生产的结果,并将其与最近的MAGIC观测。

英文摘要:

LS I +61 303 has been recently detected as a periodic gamma-ray source by the Major Atmospheric Imaging Cerenkov (MAGIC) telescope. A distinctive orbital correlation of the $γ$-ray emission was found. This work shows that the range of uncertainties yet at hand in the orbital elements of the binary system LSI as well as in the possible assumptions on the stellar wind of the optical companion play a non-negligible role in the computation of opacities to high energy processes leading to $γ$-ray predictions. The geometry influence on the propagation and escape of $γ$-ray photons is explored. With this study at hand, we analyse the results of a pulsar wind zone model for the production of gamma-rays and compare it with recent MAGIC observations.

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