论文标题
Abell 980中的无线电源：独立的双双射电射线银河系？
The radio source in Abell 980: A Detached-Double-Double Radio Galaxy?
论文作者
论文摘要
有人认为，从最近发表的Lofar两米天空调查数据释放2（144 MHz的Lots-2）观察到集群Abell 980（A980）的观察结果，结合了现有的GMRT和VLA较高的频率观察，从较高的频率上提供了两次透明的射击，该集群的两次遍布遍布，从而使遍布量的透明效果，该集群的两次遍布，从而使遍布量的两次遍布，从而使遍布的透明遍及遍布，从而使遍布的透明效果，从而使人们的射程均高出了，从而提高了这一范围，从而使两次透露能够启用，从而使得遍布的两倍，从而使两次遍布透明效果。由最明亮的簇星系（BCG）产生的两次主要发作。上一个活动留下的两个无线电裂片已经扩散并开发了一个超强的无线电光谱，同时通过限制热的群集内介质（ICM）浮动地升起，同时，主机银河已漂移到集群中心，并进入了一个由一个偶然的年轻双重无线电源出现的新的活性相。 The new observational results and arguments presented here bolster the case that the old and young double radio sources in A980 conjointly represent a `double-double' radio galaxy whose two lobe-pairs have lost colinearity due to the (lateral) drift of their parent galaxy, making this system by far the most plausible case of a `Detached-Double-Double Radio Galaxy' (dDDRG).
It is argued that the new morphological and spectral information gleaned from the recently published LoFAR Two meter Sky Survey data release 2 (LoTSS-2 at 144 MHz) observations of the cluster Abell 980 (A980), in combination with its existing GMRT and VLA observations at higher frequencies, provide the much-needed evidence to strengthen the proposal that the cluster's radio emission comes mainly from two double radio sources, both produced by the brightest cluster galaxy (BCG) in two major episodes of jet activity. The two radio lobes left from the previous activity have become diffuse and developed an ultra-steep radio spectrum while rising buoyantly through the confining hot intra-cluster medium (ICM) and, concomitantly, the host galaxy has drifted to the cluster centre and entered a new active phase manifested by a coinciding younger double radio source. The new observational results and arguments presented here bolster the case that the old and young double radio sources in A980 conjointly represent a `double-double' radio galaxy whose two lobe-pairs have lost colinearity due to the (lateral) drift of their parent galaxy, making this system by far the most plausible case of a `Detached-Double-Double Radio Galaxy' (dDDRG).
