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The High-Redshift Clusters Occupied by Bent Radio AGN (COBRA) Survey

Published online by Cambridge University Press:  17 August 2016

Rachel Paterno-Mahler ,
Elizabeth L. Blanton ,
Joshua Wing ,
M.L.N. Ashby ,
Mark Brodwin  and
Emmet Golden-Marx
Rachel Paterno-Mahler
Affiliation:
Astronomy Department and Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA email: rachelpm@umich.edu, eblanton@bu.edu
Elizabeth L. Blanton
Affiliation:
Astronomy Department and Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA email: rachelpm@umich.edu, eblanton@bu.edu
Joshua Wing
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: jwing@cfa.harvard.edu, mashby@cfa.harvard.edu
M.L.N. Ashby
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: jwing@cfa.harvard.edu, mashby@cfa.harvard.edu
Mark Brodwin
Affiliation:
Department of Physics and Astronomy, University of Missouri-Kansas City, 5110 Rockhill Road, Kansas City, MO 64110, USA email: brodwinm@umkc.edu
Emmet Golden-Marx
Affiliation:
Astronomy Department and Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA email: rachelpm@umich.edu, eblanton@bu.edu
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Abstract

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The number of confirmed, high-redshift galaxy clusters is very low compared to the number of well-studied clusters nearby. Bent, double-lobed radio sources are frequently found in galaxy clusters, and thus can be used as tracers for efficiently locating high-redshift clusters. Using our Spitzer Snapshot Survey, we have identified approximately 300 potential new clusters with redshifts 0.7 < z < 3. These objects make up the high-redshift portion of the Cluster Occupied by Bent Radio AGN (COBRA) survey. We have created color-magnitude diagrams using infrared and optical data. Using the colors of the radio source host and the red sequence we can estimate redshifts for our clusters, as well as examine the evolution of the cluster galaxies over a large range of cosmic time.

Keywords

galaxies: activegalaxies: evolutiongalaxies: clusters: generalgalaxies: high-redshiftinfrared: galaxiesradio continuum: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S319: Galaxies at High Redshift and Their Evolution Over Cosmic Time , August 2015 , pp. 62
Copyright
Copyright © International Astronomical Union 2016 

References

Mancone, C. L. & Gonzalez, A. H. 2012, PASP, 124, 606 CrossRefGoogle Scholar
Wing, J. D. & Blanton, E. L. 2011, AJ, 141, 88 CrossRefGoogle Scholar