论文标题
高清晰度中的星系群：暗物质搜索
Galaxy clusters in high definition: a dark matter search
论文作者
论文摘要
最近带有ATCA和ASKAP望远镜的射频探针证明自己处于对暗物质特性施加间接限制的最前沿。后者能够实质上超过费米 - 拉特数据的约束能力。然而，这些观察结果仅基于矮星系，在磁场不确定性很大。在这里，我们通过考虑将已知簇表面亮度曲线的外推到可观察到的比例可观察到的尺度，从而重新检查了银河簇的情况，通常由于实质性弥漫性无线电背景而被忽略。尽管有较大的重型背景，我们发现簇可以与矮星系具有竞争力。推断昏迷数据能够排除质量$ <700 $ gev通过$ b $ quarks歼灭的wim。这是在磁场和扩散环境周围的不确定性较小的同时。由于暗物质光环的内部形状与无线电光环的平坦内部轮廓之间的冲突，这种令人信服的结果是可能的，这对于NFW样的Einasto剖面最为明显，在文献中有一些支持证据。
Recent radio-frequency probes, with the ATCA and ASKAP telescopes, have proven themselves to be at the forefront of placing indirect limits on the properties of dark matter. The latter being able to substantially exceed the constraining power of Fermi-LAT data. However, these observations were based only on dwarf galaxies, where magnetic field uncertainties are large. Here we re-examine the case for galaxy clusters, often ignored due to substantial diffuse radio backgrounds, by considering the extrapolation of known cluster surface brightness profiles down to scales observable with MeerKAT. Despite large baryonic backgrounds, we find that clusters can be competitive with dwarf galaxies. Extrapolated Coma data being able to rule out WIMPs of mass $< 700$ GeV annihilating via $b$-quarks. This is while having lesser uncertainties surrounding the magnetic field and diffusive environment. Such compelling results are possible due to a clash between the inner shape of the dark matter halo and the flat inner profile of radio halos which is most pronounced for NFW-like Einasto profiles, the presence of which having some supporting evidence in the literature.
