标题： 中子星与QCD轴子小团块相遇的瞬态射电特征 显示英文标题

标题： Transient Radio Signatures from Neutron Star Encounters with QCD Axion Miniclusters

摘要： 如果Peccei-Quinn对称性在宇宙膨胀之后被打破，QCD轴子预计将形成称为轴子微簇的致密结构。 至今仍存活的微簇将与银河系中的中子星（NSs）相互作用，在中子星磁层中产生轴子-光子转换的瞬态射电信号。 我们量化了这些相遇的特性，并发现它们发生频繁（$\mathcal{O}(1-100)\,\mathrm{day}^{-1}$）；持续时间在一天到几个月之间；在空间上集中在银河系中心；并且可以达到可观测的通量。 这些射电瞬变现象处于当前一代望远镜的探测范围内，因此为发现QCD轴子暗物质提供了一条有希望的途径。 显示英文摘要

摘要： The QCD axion is expected to form dense structures known as axion miniclusters if the Peccei-Quinn symmetry is broken after inflation. Miniclusters that have survived until today will interact with neutron stars (NSs) in the Milky Way to produce transient radio signals from axion-photon conversion in the NS magnetosphere. We quantify the properties of these encounters and find that they occur frequently ($\mathcal{O}(1-100)\,\mathrm{day}^{-1}$); last between a day and a few months; are spatially clustered towards the Galactic center; and can reach observable fluxes. These radio transients are within reach of current generation telescopes and therefore offer a promising pathway to discovering QCD axion dark matter.