论文标题
银河中心伽马射线过剩的状态
The Status of the Galactic Center Gamma-Ray Excess
论文作者
论文摘要
银河中心伽玛射线过量的频谱，角度分布和总体强度与以$ m_x \ sim 50 \，{\ rm gev} $热液体形式歼灭暗物质颗粒的预期非常吻合。先前声称这些光子聚集在小角度尺度上或追踪已知恒星种群的分布似乎偏爱解释，在这种解释中，该信号源自大量未解决的毫秒毫秒脉冲星。然而，最近的工作推翻了这些结论，发现观察到的伽马射线过剩确实具有可辨别的小规模功率，并以近似的球形对称性分布，而不是追踪任何已知的恒星群体。鉴于这些结果，现在似乎更有可能通过消灭暗物质产生的银河中心伽马射线过量。
The Galactic Center Gamma-Ray Excess has a spectrum, angular distribution, and overall intensity that agree remarkably well with that expected from annihilating dark matter particles in the form of a $m_X \sim 50 \, {\rm GeV}$ thermal relic. Previous claims that these photons are clustered on small angular scales or trace the distribution of known stellar populations once appeared to favor interpretations in which this signal originates from a large population of unresolved millisecond pulsars. More recent work, however, has overturned these conclusions, finding that the observed gamma-ray excess does {\it not} contain discernible small scale power, and is distributed with approximate spherical symmetry, not tracing any known stellar populations. In light of these results, it now appears significantly more likely that the Galactic Center Gamma-Ray Excess is produced by annihilating dark matter.
