中等质量黑洞和邻近暗物质点源：一个重要的再评估
Intermediate Mass Black Holes and Nearby Dark Matter Point Sources: A Critical Reassessment
摘要：
近年来，关于银河系中存在中等质量黑洞（IMBH）并在其周围形成暗物质（DM）"迷你尖峰“的提议受到了相当大的关注。事实上，在某些情况下，导致伽马射线，中微子和带电宇宙射线的大湮灭通量，这些物体有时被引用为间接DM搜索最有希望的目标之一。在这封信中，我们应用了详细的统计分析来指出，现有的EGRET数据已经对这些情况进行了非常严格的限制，使得这些物体中的任何一个都不太可能被观察到，例如，费米/GLAST卫星或即将到来的切伦科夫望远镜。我们还证明了在中微子或带电宇宙射线中观测信号的前景似乎更糟。最后，我们解决的问题，是否在宇宙射线的正电子/电子通量最近报告的PAMELA/ATIC可能是由于附近的DM点源，如DM块或迷你穗;伽马射线的界限，以及最近公布的费米宇宙射线电子和正电子数据，再次排除这种可能性，为传统的DM候选人，并强烈约束它DM纯粹湮灭成轻轻子。
英文摘要：
The proposal of a galactic population of intermediate mass black holes (IMBHs), forming dark matter (DM) ``mini-spikes'' around them, has received considerable attention in recent years. In fact, leading in some scenarios to large annihilation fluxes in gamma rays, neutrinos and charged cosmic rays, these objects are sometimes quoted as one of the most promising targets for indirect DM searches. In this letter, we apply a detailed statistical analysis to point out that the existing EGRET data already place very stringent limits on those scenarios, making it rather unlikely that any of these objects will be observed with, e.g., the Fermi/GLAST satellite or upcoming Air Cherenkov telescopes. We also demonstrate that prospects for observing signals in neutrinos or charged cosmic rays seem even worse. Finally, we address the question of whether the excess in the cosmic ray positron/electron flux recently reported by PAMELA/ATIC could be due to a nearby DM point source like a DM clump or mini-spike; gamma-ray bounds, as well as the recently released Fermi cosmic ray electron and positron data, again exclude such a possibility for conventional DM candidates, and strongly constrain it for DM purely annihilating into light leptons.
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