TANAMI --用南方毫弧秒干涉术跟踪活动星系核
TANAMI - Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry
摘要：
介绍了TANAMI（Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry）的观测策略，该计划利用澳大利亚长基线阵列（LBA）和跨洋天线Hartebeesthoek、TIGO和O 'Higgins研究南半球活动星系核（AGN）中相对论喷流的秒差距尺度结构和动力学。TANAMI的重点是在-30摄氏度以南的河外源，每两个月在8.4 GHz和22 GHz以毫角秒分辨率进行观测。在费米伽马射线太空望远镜发射之前，已经确定了43个源的初始TANAMI样本，以包括将用其大面积望远镜（LAT）探测的最有希望的明亮伽马射线发射候选者。自2008年11月以来，我们一直在增加新的来源的样本，现在包括所有已知的无线电和伽马射线明亮的南半球活动星系核。VLBI和γ射线观测的结合对于了解活动星系核的宽带辐射特征和相对论喷流的性质是至关重要的。
英文摘要：
We present a summary of the observation strategy of TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry), a monitoring program to study the parsec-scale structure and dynamics of relativistic jets in active galactic nuclei (AGN) of the Southern Hemisphere with the Australian Long Baseline Array (LBA) and the trans-oceanic antennas Hartebeesthoek, TIGO, and O'Higgins. TANAMI is focusing on extragalactic sources south of -30 degrees declination with observations at 8.4 GHz and 22 GHz every ~2 months at milliarcsecond resolution. The initial TANAMI sample of 43 sources has been defined before the launch of the Fermi Gamma Ray Space Telescope to include the most promising candidates for bright gamma-ray emission to be detected with its Large Area Telescope (LAT). Since November 2008, we have been adding new sources to the sample, which now includes all known radio- and gamma-ray bright AGN of the Southern Hemisphere. The combination of VLBI and gamma-ray observations is crucial to understand the broadband emission characteristics of AGN and the nature of relativistic jets.
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