A 5 GHz Southern Hemisphere VLBI Survey of Compact Radio Sources. II.
A 5 GHz Southern Hemisphere VLBI Survey of Compact Radio Sources. II.
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DOI：
10.1086/118621
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发表时间：
1997-09
期刊：
影响因子：
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通讯作者：
Z. Shen;T. Wan;J. Moran;D. Jauncey;J. Reynolds;A. Tzioumis;R. Gough;R. Ferris;M. Sinclair
中科院分区：
文献类型：
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作者：
Z. Shen;T. Wan;J. Moran;D. Jauncey;J. Reynolds;A. Tzioumis;R. Gough;R. Ferris;M. Sinclair
我们报告了对耀变体样本的5 GHz南半球快照VLBI观测结果。这些观测是在1993年5月由南半球VLBI台网加上海站进行的。对23个平谱、无线电噪声源进行了成像。这些是其中15个源的第一批VLBI图像。其中8个源为EGRET (bbb100 MeV) γ射线源。微弧秒形态显示12个源为核-射流结构，其余11个源为单一致密核。没有紧致重瓣。与其他不同时期和/或不同频率的射电图像相比，三个核心射流耀变体显示出弯曲射流的证据，并且在两个耀变体的情况下有一些超光速运动的证据。给出了对单个耀变体的详细描述。
We report the results of a 5 GHz Southern Hemisphere snapshot VLBI observation of a sample of blazars. The observations were performed with the Southern Hemisphere VLBI Network plus the Shanghai station in 1993 May. Twenty-three flat-spectrum, radio-loud sources were imaged. These are the first VLBI images for 15 of the sources. Eight of the sources are EGRET (>100 MeV) γ-ray sources. The milliarcsecond morphology shows a core-jet structure for 12 sources and a single compact core for the remaining 11. No compact doubles were seen. Compared with other radio images at different epochs and/or different frequencies, three core-jet blazars show evidence of bent jets, and there is some evidence for superluminal motion in the cases of two blazars. Detailed descriptions for individual blazars are given.