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EGRET活动星系核的VLBI观测研究
洪晓瑜 蒋栋荣 王伟华 安 涛
(中国科学院上海天文台 上海 200030)
(中国科学院国家天文台 北京 100012)
摘 要
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EGRET空间望远镜已检测到66颗高置信度的g
射线活动星系核。这些活动星系核都是射电强的，具有很高的光度，迅速的光学变化，有相当的比例是视超光速源。对g
射线活动星系核的研究是目前世界上最活跃的前沿课题之一。为了完备EGRET
活动星系核的射电观测图像样本，以便进行更可信的统计研究。对一些缺少射电图像观测的EGRET活动星系核进行了多历元的VLBI和VLA的观测研究，得到了它们的射电结构图像。
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| 关键词 |
活动星系核 －
射电喷流 －
g
射线 －
VLBI |
| 分类号 |
P157.6 |
VLBI Observations of EGRET-detected AGNs
Hong
Xiaoyu Jiang Dongrong
Wang Weihua An Tao
(Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai
200030)
(Chinese Astronomical Observatories, Chinese Academy of Sciences, Beijing
100012)
Abstract
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66 active galactic nuclei (AGNs) with high-confidence level have been
detected by EGRET identification. All these AGNs are the radio bright,
with the dramatic peak of the luminosity spectra at g-ray
frequencies, rapid optical variability, and the high fraction of
superluminal sources. To investigate the relation between the g-ray
emission and the radio structure, we observed a subsample of EGRET
sources with VLBI and VLA, which radio images are absent in the
literature. These results will be useful for the statistical research. |
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| Key words |
AGNs
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Jet －
Gamma-ray － VLBI |
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