对费米望远镜观测到的银河系中心辐射的评论
A comment on the emission from the Galactic Center as seen by the Fermi telescope
摘要:
Hooper和Goodenough(1010.2752)在最近的论文中报道,与大尺度扩散辐射和已知点源的贡献相比,来自银河系中心区域的伽马射线辐射包含过量。这种过剩被认为是一致的信号湮灭的暗物质与幂律密度分布。我们重新分析了费米数据,发现它与扩散发射和已知点源的"标准模型"是一致的。与1010.2752的解释不一致的主要原因是1010.2752中假设的银河系中心点源的光谱不同(与以前的工作相比)。我们讨论这种解释的可能原因。
英文摘要:
In the recent paper of Hooper & Goodenough (1010.2752) it was reported that gamma-ray emission from the Galactic Center region contains an excess compared to the contributions from the large-scale diffuse emission and known point sources. This excess was argued to be consistent with a signal from annihilation of Dark Matter with a power law density profile. We reanalyze the Fermi data and find instead that it is consistent with the "standard model" of diffuse emission and of known point sources. The main reason for the discrepancy with the interpretation of 1010.2752 is different (as compared to the previous works) spectrum of the point source at the Galactic Center assumed in 1010.2752. We discuss possible reasons for such an interpretation.
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