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arXiv 1509.01992astro-ph.HE
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冷超相对论正负电子脉冲星风对宇宙微波背景的康普顿化和~100 GeV线的起源

Comptonization of cosmic microwave background by cold ultra-relativistic electron-positron pulsar wind and origin of ~100 GeV lines

Dmytro Iakubovskyi, Sergey Yushchenko

摘要:

以前,[1207.0458]提出了费米/LAT [1205.4700]在银河系中心区域观察到的~100 GeV的窄伽马射线线状特征的天体物理解释。[1207.0458]的模型是基于冷的超相对论正负电子脉冲星风对外部紫外线/X射线辐射的逆康普顿散射。我们指出,超宽的~30 MeV分量应来自于宇宙微波背景辐射的康普顿化。我们估计这个组件的主要参数,并表明,它可以检测到MeV的望远镜,如CGRO/COMPTEL。CGRO/COMPTEL未确认源GRO J1823-12的位置接近超过105-120 GeV的发射([1205.4700]的Reg.1),可以解释为支持~100 GeV狭窄特征的天体物理模型的论据。

英文摘要:

Previously, [1207.0458] proposed an astrophysical explanation of narrow gamma-ray line-like feature(s) at ~100 GeV from Galactic Center region observed by Fermi/LAT [1205.4700]. The model of [1207.0458] is based on the inverse Compton scattering of external ultra-violet/X-ray radiation by a cold ultra-relativistic electron-positron pulsar wind. We show that the extra broad ~30 MeV component should arise from Comptonization of cosmic microwave background radiation. We estimate the main parameters of this component and show that it can be detectable with MeV telescopes such as CGRO/COMPTEL. The location of CGRO/COMPTEL unidentified source GRO J1823-12 close to excess of 105-120 GeV emission (Reg.1 of [1205.4700]) can be interpreted as an argument in favour of astrophysical model of the narrow feature(s) at ~100 GeV.

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