Searching for Galaxy Clusters Around AGN at z 1 Using Spitzer Archival Imaging Data

Details Searching for Galaxy Clusters Around AGN at z 1 Using Spitzer Archival Imaging Data Searching for Galaxy Clusters Around AGN at z 1 Using Spitzer Archival Imaging Data

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933807m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #338.07

Astronomy and Astrophysics

Astronomy

Scientific paper

We are using Spitzer Space Telescope archival data from the Infrared Array Camera (IRAC) at 3.6 and 4.5 microns to locate galaxy clusters at z 1. 168 fields that targeted Active Galactic Nuclei (AGN) at z 1 were taken from the archive and a [3.6] - [4.5] color selection was applied to all sources in each field. At a z 1 the peak of a galaxy's stellar emission is redshifted into the 3.6 micron band and so makes those galaxies bluer than foreground galaxies. If an overdensity of sources with the appropriate color was detected around the AGN, then the field was marked as having a potential cluster around the AGN and will be followed up for spectroscopic confirmation.

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