OH巨脉泽中河外塞曼探测
Extragalactic Zeeman Detections in OH Megamasers
摘要：
我们用305米阿雷西博望远镜和100米绿岸望远镜测量了5个超亮红外星系（[U]LIRGs）1667 MHz OH超脉泽的塞曼分裂。八个目标星系中有五个显示出显著的塞曼分裂探测，探测到14个单独的激射分量，视线磁场强度范围从~0.5-18 mG。检测到的场强与银河OH脉泽中测量的场强相似，这表明大质量恒星形成的局部过程发生在（U）LIRGs和银河系相似的条件下，尽管大尺度环境有很大的不同。我们测量的磁场强度也类似于从同步加速器观测中推断的（U）LIRGs中的磁场强度，这意味着毫高斯磁场可能遍布（U）LIRGs中星际介质的大多数相位。这些结果为探索遥远星系的天体物理学提供了一个有前途的新工具。
英文摘要：
We have measured the Zeeman splitting of OH megamaser emission at 1667 MHz from five (ultra)luminous infrared galaxies ([U]LIRGs) using the 305 m Arecibo telescope and the 100 m Green Bank Telescope. Five of eight targeted galaxies show significant Zeeman-splitting detections, with 14 individual masing components detected and line-of-sight magnetic field strengths ranging from ~0.5-18 mG. The detected field strengths are similar to those measured in Galactic OH masers, suggesting that the local process of massive star formation occurs under similar conditions in (U)LIRGs and the Galaxy, in spite of the vastly different large-scale environments. Our measured field strengths are also similar to magnetic field strengths in (U)LIRGs inferred from synchrotron observations, implying that milligauss magnetic fields likely pervade most phases of the interstellar medium in (U)LIRGs. These results provide a promising new tool for probing the astrophysics of distant galaxies.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
