Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-09-22
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
4 page proceedings, "The Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters"
Scientific paper
We present results from our multi-wavelength study of SG1120, a super galaxy group at z=0.37, that will merge to form a galaxy cluster comparable in mass to Coma. We have spectroscopically confirmed 174 members in the four X-ray luminous groups that make up SG1120, and these groups have velocity dispersions of sigma(1D)=303-580 km/s. We find that the supergroup has an excess of 24 micron members relative to CL1358+62, a rich galaxy cluster at z=0.33. SG1120 also has an increasing fraction of 24 micron members with decreasing local galaxy density, i.e. an infrared-density relation, that is not observed in the rich cluster. We detect nine of the group galaxies in VLA 1.4 Ghz imaging, and comparison of the radio to total infrared luminosities indicates that about 30% of these radio-detected members have AGN. The radio map also reveals that one of the brightest group galaxies has radio jets. We are currently analysing the 1.4 Ghz observations to determine if AGN can significantly heat the intrahalo medium and if AGN are related to the excess of 24 micron members.
Saintonge Amelie
Tran Kim-Vy H.
No associations
LandOfFree
The Importance of AGN in an Assembling Galaxy Cluster 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 Importance of AGN in an Assembling Galaxy Cluster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Importance of AGN in an Assembling Galaxy Cluster will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-181003