对“用NGC4214星系的射电连续谱数据约束湮灭暗物质质量”一文的评论
Comment on "Constraining the annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy"
摘要：
在他们最近的论文中，Chan和Lee讨论了一个有趣的可能性：矮不规则星系的射电连续辐射可能被用来限制湮灭暗物质截面的上限。他们声称，非热辐射和热辐射的贡献可以用这样的精确度来估计，以至于人们可以对湮灭截面设置新的上限。我们认为，所提出的意见，可以完全解释与标准的光谱和没有贡献的暗物质。因此，Chan和Lee的估计上限至少低了100倍。
英文摘要：
In their recent paper, Chan and Lee discuss an interesting possibility: radio continuum emission from a dwarf irregular galaxy may be used to constrain upper limits on the cross section of annihilating dark matter. They claim that the contributions from nonthermal and thermal emission can be estimated with such accuracy that one can place new upper limits on the annihilation cross section. We argue that the observations presented can be explained entirely with a standard spectrum and no contribution from dark matter. As a result, the estimated upper limits of Chan and Lee are atleast by a factor of 100 too low.
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