Neutral-pion-decay gamma rays from the galaxy and the interstellar gas content

Neutral-pion-decay gamma rays from the galaxy and the interstellar gas content
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来自星系的中性π介子衰变伽马射线和星际气体含量

DOI:
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发表时间:
1973
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通讯作者:
F. Stecker
F. Stecker
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文献类型:
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作者:
F. Stecker

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在星际宇宙射线相互作用中产生的中性π介子衰变产生的每个H原子的总γ射线产生率的知识对于确定星际H2的可能数量是必不可少的。这个生产率是重新计算在这里使用最新的加速器数据中性π介子生产的p-p相互作用高达约1500 GeV。这里使用的一个简单但准确的近似值解决了过去对这个速率大小的分歧。得到的上限为(1.51 ± 0.23)乘以10的-25次方/秒,与观察到的上限1.6乘以10的-25次方/秒一致。
Knowledge of the total gamma-ray production rate per H atom from the decay of neutral pions produced in interstellar cosmic-ray interactions is essential for determining the possible amount of interstellar H2. This production rate is recalculated here using the latest accelerator data on neutral pion production in p-p interactions up to about 1500 GeV. A simple but accurate approximation used here resolves the past disagreement over the magnitude of this rate. An upper limit is obtained of (1.51 plus or minus 0.23) times 10 to the -25th power/sec, consistent with the observed upper limit of 1.6 times 10 to the -25th power/sec.