论文标题
根据伽马射线观测，geminga对宇宙射线正电子过剩的贡献
Geminga contribution to the cosmic-ray positron excess according to the gamma-ray observations
论文作者
论文摘要
我们试图通过从附近的Pulsar Geminga注射来解释宇宙射线的过量，假设有两个区域的扩散场景和低能截止的注入频谱。由于Geminga的高能量主机和电子可以通过反康普顿散射诱导$γ$射线，因此我们考虑到Hawc周围Geminga周围的扩展$γ$ ray观察到$ \ sim 10 $ tev tev tev和Fermi-lat，以$ \ MATHCAL {O}（O}（O}（10）$ GEV）。根据对费米 - 拉特数据分析所主张的扩展$γ$ ray观察，我们发现geminga可以解释$ 30 \％$ $的能量转换效率到正电子和电子中的效率。但是，基于对另一项费米 - 拉特分析给出的扩展$γ$射线的约束，来自geminga的正电子不足以说明正电子过量。对扩展$γ$射线的费米 - 拉特数据进行进一步的强大分析对于确定geminga是否可以解释正电子过多至关重要。
We attempt to interpret the cosmic-ray positron excess by injection from the nearby pulsar Geminga, assuming a two-zone diffusion scenario and an injection spectrum with a low energy cutoff. Since the high energy positrons and electrons from Geminga can induce $γ$ rays via inverse Compton scattering, we take into account the extended $γ$-ray observations around Geminga from HAWC for $\sim 10$ TeV and from Fermi-LAT for $\mathcal{O}(10)$ GeV. According to the extended $γ$-ray observation claimed by an analysis of Fermi-LAT data, we find that Geminga could explain the positron excess for a $30\%$ energy conversion efficiency into positrons and electrons. However, based on the constraint on the extended $γ$ rays given by another Fermi-LAT analysis, positrons from Geminga would be insufficient to account for the positron excess. A further robust analysis of Fermi-LAT data for the extended $γ$ rays would be crucial to determine whether Geminga can explain the positron excess or not.
