20 GHz南天最大和最亮星的宽视场成像和偏振测量
Wide-Field Imaging and Polarimetry for the Biggest and Brightest in the 20GHz Southern Sky
摘要：
我们目前的宽视场成像和偏振在20 GHz的七个最广泛的，明亮的（Stot >= 0.50焦耳），高频选定的无线电源在南部天空的赤纬< -30度。伴随的数据是对每个来源的文献的简要回顾，这里提出的结果有助于澳大利亚望远镜20 GHz巡天的亮源样本的统计完整性。这些数据对于未来的宇宙微波背景任务至关重要，因为它们收集了有关候选校准源的信息。我们能够获得我们的选择标准确定的九个来源中的七个的数据。我们报告说，Pictor A是迄今为止普朗克欧洲航天局任务低频仪器的最佳河外校准器候选者，因为它在10弧分的尺度上具有高水平的综合偏振通量密度（0.50+/-0.06 Jy）。七个来源中有六个有一个清晰的致密射电核心，从核中检测到的偏振发射要么为零，要么不到2%。大多数检测到喷流的源具有纵向配置的磁场排列，然而PKS 1333 -33表现出横向场和从核到喷流的场几何形状的正交变化。
英文摘要：
We present wide-field imaging and polarimetry at 20GHz of seven of the most extended, bright (Stot >= 0.50 Jy), high-frequency selected radio sources in the southern sky with declinations < -30 deg. Accompanying the data are brief reviews of the literature for each source, The results presented here aid in the statistical completeness of the Australia Telescope 20GHz Survey's bright source sample. The data are of crucial interest for future cosmic microwave background missions as a collection of information about candidate calibrator sources. We are able to obtain data for seven of the nine sources identified by our selection criteria. We report that Pictor A is thus far the best extragalactic calibrator candidate for the Low Frequency Instrument of the Planck European Space Agency mission due to its high level of integrated polarized flux density (0.50+/-0.06 Jy) on a scale of 10 arcmin. Six of the seven sources have a clearly detected compact radio core, with either a null or less than two percent detection of polarized emission from the nucleus. Most sources with detected jets have magnetic field alignments running in a longitudinal configuration, however PKS1333-33 exhibits transverse fields and an orthogonal change in field geometry from nucleus to jets.
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。
