中德银河面6厘米偏振巡天II。东经129度到230度的区域
A Sino-German 6 cm polarization survey of the Galactic plane II. The region from 129 degree to 230 degree longitude
摘要：
当适当考虑沿视线的法拉第旋转时，线性偏振的银河系同步辐射提供了关于银河系磁场和星际磁离子介质的性质的有价值的信息。我们的目标是调查银河平面在6厘米，包括线性偏振。在如此短的波长下，法拉第旋转效应一般很小，银河系磁场的性质可以在比长波长更远的距离上进行探测。乌鲁木齐25米望远镜用于总强度和偏振强度的6厘米灵敏测量。WMAP K波段（22.8 GHz）极化数据被用来恢复乌鲁木齐U和Q地图的绝对零度水平外推。给出了银道面129 ° <1 ° < 230 °和反中心|b| < 5 °区域的总强度图和偏振图，其角分辨率为9“5，总强度和偏振强度的平均灵敏度分别为0.6 mK和0.4 mK Tb。我们简要地讨论了在6厘米偏振图中探测到的一些扩展法拉第屏的性质。中德6厘米偏振测量提供了有关磁ISM性质的新信息。该调查还增加了离散的银河系物体的有价值的信息，特别适合于检测具有大旋转措施的扩展法拉第屏幕，该屏幕具有强大的规则磁场。
英文摘要：
Linearly polarized Galactic synchrotron emission provides valuable information about the properties of the Galactic magnetic field and the interstellar magneto-ionic medium, when Faraday rotation along the line of sight is properly taken into account. We aim to survey the Galactic plane at 6 cm including linear polarization. At such a short wavelength Faraday rotation effects are in general small and the Galactic magnetic field properties can be probed to larger distances than at long wavelengths. The Urumqi 25-m telescope is used for a sensitive 6 cm survey in total and polarized intensities. WMAP K-band (22.8 GHz) polarization data are used to restore the absolute zero-level of the Urumqi U and Q maps by extrapolation. Total intensity and polarization maps are presented for a Galactic plane region of 129 degree < l < 230 degree and |b| < 5 degree in the anti-centre with an angular resolution of 9'5 and an average sensitivity of 0.6 mK and 0.4 mK Tb in total and polarized intensity, respectively. We briefly discuss the properties of some extended Faraday Screens detected in the 6 cm polarization maps. The Sino-German 6 cm polarization survey provides new information about the properties of the magnetic ISM. The survey also adds valuable information for discrete Galactic objects and is in particular suited to detect extended Faraday Screens with large rotation measures hosting strong regular magnetic fields.
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