Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-07-30
Astronomy and Astrophysics
Astrophysics
37 pages, LaTex, 14 Postscript tables, 17 Postscript figures. The paper has been accepted for publication in AJ
Scientific paper
10.1086/118600
We present the results of our multiwavelength study of two nearby Abell clusters that contain extended tailed radio sources. From our analysis of PSPC X-ray, VLA radio, and optical data, we find strong evidence that these clusters are not relaxed. Significant X-ray substructure is revealed by examining their X-ray surface brightness maps. We report 130 new redshifts from the fields of A578 and A1569 and detect the presence of substructure in the velocity and spatial distribution of galaxies. Furthermore, we find that the radio sources in A578 are at rest with respect to their subclusters and that the Wide-Angled Tailed (WAT) source in A1569 has a small peculiar motion with respect to its subcluster. The standard model of ram pressure induced jet curvature requires relative velocities of the radio sources with respect to the ICM of > 1000 km/s. Therefore, the apparent peculiar velocities of the radio galaxies can not explain the bending of the jets/tails for the Narrow-Angled Tailed (NAT) radio source in A578 and for the WAT in A1569. We suggest that a cluster- subcluster merger model provides a reasonable explanation for the observed X-ray and optical substructure. Numerical simulations of cluster-subcluster mergers predict a bulk flow of ICM gas that has sufficient dynamic pressure for bending the extended radio sources. Thus, a cluster-subcluster merger can provide the environment responsible for the observed cluster X-ray and optical morphologies and for the bending seen in the radio sources.
Burns O. Jr. J.
Gomez Percy L.
Hill John M.
Ledlow Michael J.
Pinkney Jason
No associations
LandOfFree
The Cluster Dynamics, X-ray Emission, and Radio Galaxies in Abell 578 and Abell 1569 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Cluster Dynamics, X-ray Emission, and Radio Galaxies in Abell 578 and Abell 1569, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Cluster Dynamics, X-ray Emission, and Radio Galaxies in Abell 578 and Abell 1569 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-680018