IRAC Imaging of Massive ACT SZ Clusters

Details IRAC Imaging of Massive ACT SZ Clusters IRAC Imaging of Massive ACT SZ Clusters

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70149m&link_type=abstract

Spitzer Proposal ID #70149

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Scientific paper

We propose to obtain deep Spitzer observations for a mass-selected and redshift-independent sample of galaxy clusters detected by the Atacama Cosmology Telescope (ACT) using the Sunyaev-Zeldovich effect (SZE). The proposed deep IRAC observations of 19 massive, newly-discovered SZE clusters will provide an unprecedented window to study the properties of high redshift lensed background galaxies and an unbiased census of the stellar mass content in massive clusters out to redshifts of 1. Additionally, we propose shallower IRAC imaging of 6 high-significance (S/N > 5) SZE cluster candidates that were not detected in our deep optical program in order to probe the existence of z > 1.5 massive systems and provide a simple yet powerful test of Lambda-CDM. The proposed Spitzer observations are part of an intensive multi-wavelength campaign to produce an unbiased, well-observed sample of massive galaxy clusters out to high redshifts for cosmological investigations.

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