论文标题
突破性收听银河中心调查的外星轴心搜索
Extraterrestrial Axion Search with the Breakthrough Listen Galactic Center Survey
论文作者
论文摘要
斧头暗物质（DM）可以有效地转换为中子星（NSS）的磁层中的光子，从而产生几乎单色的无线电发射。当基础电荷分布诱导的血浆频率大致与轴突质量匹配时，此过程会引起共鸣。我们使用Breakthrough聆听项目在C频段的银河中心调查中收集的档案绿色银行望远镜数据搜索了此过程的证据。虽然突破性的倾听旨在在无线电频段中找到外星生命的特征，但我们表明他们的银河中心区域的高频分辨率光谱数据非常适合搜索由银河系内PC中NSS群体产生的轴突 - photon转变。我们使用数据驱动的模型来捕获内部星系中NSS的分布和属性，并使用最新的射线追踪模拟来计算每个NS的预期无线电通量。我们找不到轴轴轴轴轴轴偶联的轴轴DM的证据，将值降至$ g_ {aγγ} \ sim 10^{ - 11} $ g_ { - 11} $ gev $^{ - 1} $的DM轴的15至35 $ $ $ EV之间的dm轴。
Axion dark matter (DM) may efficiently convert to photons in the magnetospheres of neutron stars (NSs), producing nearly monochromatic radio emission. This process is resonantly triggered when the plasma frequency induced by the underlying charge distribution approximately matches the axion mass. We search for evidence of this process using archival Green Bank Telescope data collected in a survey of the Galactic Center in the C-Band by the Breakthrough Listen project. While Breakthrough Listen aims to find signatures of extraterrestrial life in the radio band, we show that their high-frequency resolution spectral data of the Galactic Center region is ideal for searching for axion-photon transitions generated by the population of NSs in the inner pc of the Galaxy. We use data-driven models to capture the distributions and properties of NSs in the inner Galaxy and compute the expected radio flux from each NS using state-of-the-art ray tracing simulations. We find no evidence for axion DM and set leading constraints on the axion-photon coupling, excluding values down to the level $g_{a γγ} \sim 10^{-11}$ GeV$^{-1}$ for DM axions for masses between 15 and 35 $μ$eV.
