Very high energy γ ray absorption by the galactic interstellar radiation field
Very high energy γ ray absorption by the galactic interstellar radiation field
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DOI：
10.1051/0004-6361:20054422
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发表时间：
2005-08
影响因子：
6.5
通讯作者：
Jian-Li Zhang;X. Bi;Hong-Bo Hu
中科院分区：
文献类型：
--
作者：
Jian-Li Zhang;X. Bi;Hong-Bo Hu
目标。本文计算了银河系源极高能γ射线的衰减。方法.最近对银河系星际辐射场的计算表明，银河系中心附近的红外辐射背景非常强烈。这种辐射对极高能量的γ射线的衰减很强，并且发生在比以前认为的更低的能量下。结果结果表明，高能γ能谱的截止起始于20TeV左右，50TeV时截止率达到10%左右。
Aims. We calculate the attenuation of very high energy γ rays from Galactic sources. Methods. A recent calculation of the Galactic interstellar radiation field shows that the infra-red radiation background near the Galactic Center is very intense. The attenuation of very high energy γ rays by this radiation is strong and occurs at lower energies than previously thought. Results. Our result shows that the cutoff of the high energy γ ray spectrum begins at about 20 TeV and reaches about 10% for 50 TeV γ rays.