论文标题
M31中的宇宙射线运输和伽马射线排放
Cosmic-ray transport and gamma-ray emission in M31
论文作者
论文摘要
我们研究了从仙女座星系（M31）检测到的大规模伽马射线发射的起源（M31）的起源。我们考虑了广泛的非均匀扩散场景和宇宙射线注射源的合奏。我们发现，宇宙射线电子和质子可能是并且很可能是造成M31的部分或全部伽马射线发射的原因，其中包括从星系中心到超过100 kpc。我们还模拟了M31中的脉冲星的可能发射，并考虑了最近用Cherenkov望远镜观察到的TEV Halo观察结果所暗示的，宇宙射线加速度位点周围高效扩散的区域的影响。
We study the possibility that an extended cosmic-ray leptonic and/or hadronic halo is at the origin of the large-scale gamma-ray emission detected from the Andromeda Galaxy (M31). We consider a broad ensemble of non-homogeneous diffusion scenarios and of cosmic-ray injection sources. We find that cosmic-ray electrons and protons could be, and very likely are, responsible for part, or all, of the gamma-ray emission from M31, including out to more than 100 kpc from the center of the galaxy. We also simulate possible emission from pulsars in M31, and consider the effect of regions of highly inefficient diffusion around cosmic-ray acceleration sites, as suggested by recent TeV halo observations with Cherenkov telescopes.
