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arXiv 1705.09293astro-ph.HEastro-ph.GAhep-ph
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银心脉冲星的TeV γ射线

TeV Gamma Rays From Galactic Center Pulsars

Dan Hooper, Ilias Cholis, Tim Linden

摘要:

HAWC和Milagro望远镜对附近的Geminga和B 0656 +14的测量显示,这些物体周围存在明亮的TeV发射晕。如果银河系中心附近的年轻和中年恒星将其能量的相似部分转化为TeV光子,那么这些来源可能会主导HESS和其他地面望远镜从银河系最里面的$\sim$ $10^2$秒差距观测到的辐射。特别是,这两个光谱的形状和角度范围的排放是一致的TeV晕人口的Escherosar,虽然报告的相关性,这种排放与分子气体的分布表明,扩散强子过程也必须作出贡献。这种辐射的总通量要求银河系中心附近每百万年约有100-1000颗中子星的诞生率,这与最近的估计非常一致。

英文摘要:

Measurements of the nearby pulsars Geminga and B0656+14 by the HAWC and Milagro telescopes have revealed the presence of bright TeV-emitting halos surrounding these objects. If young and middle-aged pulsars near the Galactic Center transfer a similar fraction of their energy into TeV photons, then these sources could plausibly dominate the emission that is observed by HESS and other ground-based telescopes from the innermost $\sim$$10^2$ parsecs of the Milky Way. In particular, both the spectral shape and the angular extent of this emission is consistent with TeV halos produced by a population of pulsars, although the reported correlation of this emission with the distribution of molecular gas suggests that diffuse hadronic processes also must contribute. The overall flux of this emission requires a birth rate of ~100-1000 neutron stars per Myr near the Galactic Center, in good agreement with recent estimates.

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