在$ω$半人马座暗物质湮灭：从MWA无线电数据导出的天体物理学意义
Dark matter annihilation in $ω$ Centauri: Astrophysical implications derived from the MWA radio data
摘要：
我们提出了一个分析的Murchison宽场阵列射电望远镜数据从$ω$岑，可能是一个剥离的矮球状星系的核心捕获我们的银河系。Brown { \it et al.}对费米-LAT $γ$射线数据的最新解释（2019）和Reynoso-Cordova { \it et al.}（2019）表明，$ω$ Cen可能含有大量的暗物质。我们利用他们的最佳拟合暗物质湮灭模型，并估计磁场强度在$ω$岑，计算预期的无线电同步信号湮灭，并表明，可以有效地排除显着部分的磁场扩散系数平面使用我们目前的观测限制的无线电发射。将这些限制提高10-100倍，可能会更严格地限制模型。
英文摘要：
We present an analysis of Murchison Widefield Array radio telescope data from $ω$ Cen, possibly a stripped dwarf spheroidal galaxy core captured by our Galaxy. Recent interpretations of Fermi-LAT $γ$-ray data by Brown {\it et al.} (2019) and Reynoso-Cordova {\it et al.} (2019) suggest that $ω$ Cen may contain significant Dark Matter. We utilise their best-fit Dark Matter annihilation models, and an estimate of the magnetic field strength in $ω$ Cen, to calculate the expected radio synchrotron signal from annihilation, and show that one can usefully rule out significant parts of the magnetic field - diffusion coefficient plane using our current observational limits on the radio emission. Improvement by a factor of 10-100 on these limits could constrain the models even more tightly.
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