论文标题
巨型射电星系GRS J0844+4627中心的结构：紧凑的对称对象？
The structure at the centre of the giant radio galaxy GRS J0844+4627: a compact symmetric object?
论文作者
论文摘要
我们观察到E-Merlin在1.52和5.07 GHz的巨型射电星系GRS J0844+4627的核心区域。这些观察结果表明，GMRT看到的GRS J0844+4627中心的明显单特征由两个组件组成，在投影中分别为2.7 kpc。使用EVN在1.66 GHz处进行后续观察，揭示了这两个组成部分的复杂形态。特别是，西南组件用SDSS J084408.85+462744.2标识的西南组件在形态上类似于一个紧凑的对称对象（CSO），其预测线性大小为115 PC。如果CSO假设结果是正确的，则GRS J0844+4627的整体无线电结构是三双。鉴于CSO被认为是年轻物体，GRS J0844+4627将以最近重新启动的活跃星系出现。
We observed the core region of the giant radio galaxy GRS J0844+4627 with e-MERLIN at 1.52 and 5.07 GHz. These observations revealed that the apparent single feature at the centre of GRS J0844+4627, as seen by GMRT, consists of two components separated by 2.7 kpc in projection. Follow-up observations at 1.66 GHz using the EVN unveiled the complex morphologies of the two components. In particular, the south-western component identified with the SDSS J084408.85+462744.2 galaxy morphologically resembles a compact symmetric object (CSO) with a projected linear size of 115 pc. If the CSO hypothesis turns out to be correct, then the overall radio structure of GRS J0844+4627 is triple-double. Given that CSOs are considered young objects, GRS J0844+4627 would appear as a recently restarted active galaxy.
