AI 中文总结
本研究利用绿岸望远镜对21个恒星形成区域的激发态OH脉泽进行全斯托克斯偏振观测，发现新脉泽源并测量磁场，多数结果与先前一致，部分磁场可能变化。
AI 中文摘要
本文报告了朝向已知恒星形成区域的21个指向点的4.7和6.0 GHz激发态OH脉泽的光谱。使用绿岸望远镜在全斯托克斯模式下进行的C波段观测，测量了每个光谱中脉泽轮廓上的偏振特性如何变化，以及不同观测历元之间的变化。有7个源在任何OH跃迁中均未探测到脉泽。观测到9个源具有4.766 GHz脉泽，其中包括在G188.946+0.886和G196.454-1.677中的两个新探测。在这些脉泽中未发现新的线偏振或圆偏振。分别有7个和2个源具有6.035和6.031 GHz脉泽。所有6.035 GHz脉泽都有一定程度的圆偏振，其中3个还具有线偏振。在G133.947+1.064的6.031 GHz脉泽中发现了线偏振和圆偏振，在G141.918+1.902中发现了弱的、100%左旋圆偏振。根据测量的塞曼分裂计算了磁场。磁场的强度和方向与大多数先前的测量结果一致，尽管有一些迹象表明磁场可能正在变化。在多个4.7和6.0 GHz跃迁中观测到了热发射或吸收，其中许多跃迁此前未被报道过。
英文摘要
Spectra of 4.7 and 6.0 GHz excited OH masers from 21 pointings towards known star-forming regions are reported. The C-band observations, using the Green Bank Telescope in full Stokes mode, have measured how polarization properties vary across the maser profiles in each spectrum and vary between different epochs of observation. Seven sources had no detections of masers at any of the OH transitions. Nine sources were observed to have 4.766 GHz masers, which include two new detections in G188.946+0.886 and G196.454-1.677. No new linear or circular polarization was found in any of these masers. Seven and two sources had 6.035 and 6.031 GHz masers, respectively. All 6.035 GHz masers had some level of circular polarization, and three also had linear polarization. Both linear and circular polarization were found in the 6.031 GHz masers in G133.947+1.064, and weak, 100% LCP in G141.918+1.902. Magnetic fields have been calculated from measured Zeeman splittings. The strength and orientation of the fields agree with most previous measurements, although there are some indications that the magnetic fields could be changing. Thermal emission or absorption is seen in several of the 4.7 and 6.0 GHz transitions, many of which have not been reported before.
Comments29 pages, 20 figures, 6 tables
