论文标题
用射手座A*测试ALP-Photon耦合*
Testing the ALP-photon coupling with polarization measurements of Sagittarius A*
论文作者
论文摘要
超光玻色子（例如轴或轴突状颗粒（阿尔卑斯山））是有望解决暗物质问题的候选人。检测这种阿尔卑斯山的一种独特方法是搜索从ALP暗物质形成孤子核的区域发出的线性极化光子位置角度的周期性振荡特征。在这项工作中，我们使用银河系中心的超质量黑洞（SMBH）附近的辐射的高分辨率极化测量值，即sagittarius a $^\ star $（SGR A $^\ star $），可通过event Horizon hibor thoremon telescope搜索Ultra-Light the Ultra-lift Alps。我们在$ \ sim 10^{ - 12} {\ rm gev^{ - 1}} $的$ \ rm gev^{ - 1}} $的Alp-photon耦合上获得上限。我们的结果比从SN1987A的观察结果和在（$ 10^{ - 19} -10} -10^{ - 17} $）ev的质量窗口中获得的结果更强。通过完整的事件范围望远镜改进的极化测量可以进一步增强约束。
Ultra-light bosons such as axions or axion-like particles (ALPs), are promising candidates to solve the dark matter problem. A unique way to detect such ALPs is to search for the periodic oscillation feature of the position angles of linearly polarized photons emitted from the regions where ALP dark matter forms a solitonic core. In this work, we use the high-resolution polarimetric measurements of the radiation near the super-massive black hole (SMBH) in the center of the Milky Way, i.e., Sagittarius A$^\star$ (Sgr A$^\star$), by a sub-array of the Event Horizon Telescope to search for the ultra-light ALPs. We derive upper limits on the ALP-photon coupling of $\sim 10^{-12}{\rm GeV^{-1}}$ for ALP masses of $m\sim (10^{-19}-10^{-18})$eV. Our results are stronger than that derived from the observations of SN1987A and a population of supernovae in the mass window of ($10^{-19}-10^{-17}$)eV. Improved polarimetric measurements with the full Event Horizon Telescope can further strengthen the constraints.
