论文标题
21厘米的森林探针在通货膨胀后的Peccei-quinn对称性破坏场景中
21cm forest probes on the axion dark matter in the post-inflationary Peccei-Quinn symmetry breaking scenarios
论文作者
论文摘要
我们研究了21厘米森林观测的未来前景，当时全球Peccei-Quinn（PQ）对称性发生在通货膨胀后发生时，膜状暗物质的前景。来自轴突样颗粒的秩序统一的大量等化扰动可能会导致Minihalo形成的增强，随后的层次结构形成可能会影响Minihalo的丰度，其质量可以超过$ {\ cal O}（10^4）M _ {\ odot} $相关的21cm sobs。我们表明，21厘米的森林观测能够在$ 10^{ - 18} \ Lessim m_a \ Lessim 10^{ - 12} $ eV的范围内探测轴突样粒子质量。对于温度依赖的轴质量，可以将21厘米森林测量值的零温度轴质量尺度延伸到$ 10^{ - 6} $ eV的阶段。
We study the future prospects of the 21cm forest observations on the axion-like dark matter when the spontaneous breaking of the global Peccei-Quinn (PQ) symmetry occurs after the inflation. The large isocurvature perturbations of order unity sourced from axion-like particles can result in the enhancement of minihalo formation, and the subsequent hierarchical structure formation can affect the minihalo abundance whose masses can exceed ${\cal O}(10^4) M_{\odot}$ relevant for the 21cm forest observations. We show that the 21cm forest observations are capable of probing the axion-like particle mass in the range $10^{-18}\lesssim m_a \lesssim 10^{-12}$ eV for the temperature independent axion mass. For the temperature dependent axion mass, the zero temperature axion mass scale for which the 21cm forest measurements can be affected is extended further to as big as of order $10^{-6}$ eV.
