GALAXY CLUSTERS AROUND RADIO-LOUD ACTIVE GALACTIC NUCLEI AT 1.3 < z < 3.2 AS SEEN BY SPITZER

We report the first results from the Clusters Around Radio-Loud AGN program, a Cycle 7 and 8 Spitzer Space Telescope snapshot program to investigate the environments of a large sample of obscured and unobscured luminous radio-loud active galactic nuclei (AGNs) at 1.2 < z < 3.2. We investigate...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 769; no. 1; pp. 1 - 10
Main Authors WYLEZALEK, DOMINIKA, GALAMETZ, AUDREY, Stern, Daniel, Vernet, Joel, De Breuck, Carlos, Seymour, Nick, Brodwin, Mark, Eisenhardt, Peter R M, Gonzalez, Anthony H, Hatch, Nina
Format Journal Article
LanguageEnglish
Published United States 20.05.2013
Subjects
Active galactic nuclei
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CAMERAS
Clusters
Correlation
CORRELATIONS
DENSITY
EVOLUTION
GALAXY CLUSTERS
GALAXY NUCLEI
LUMINOSITY
ORIENTATION
QUASARS
Radio
RADIO GALAXIES
RED SHIFT
SOLIDS
SPACE
Space telescopes
SURFACES
TELESCOPES
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Summary:We report the first results from the Clusters Around Radio-Loud AGN program, a Cycle 7 and 8 Spitzer Space Telescope snapshot program to investigate the environments of a large sample of obscured and unobscured luminous radio-loud active galactic nuclei (AGNs) at 1.2 < z < 3.2. We investigate how environment depends on AGN type (unobscured radio-loud quasars versus obscured radio galaxies), radio luminosity and redshift, finding no correlation with either AGN type or radio luminosity. We find a decrease in density with redshift, consistent with galaxy evolution for this uniform, flux-limited survey. These results are consistent with expectations from the orientation-driven AGN unification model, at least for the high radio luminosity regimes considered in this sample.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/769/1/79