The Red Sequence at 1.3 < z < 1.4 in Galaxy Clusters

Mathematics – Logic

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Scientific paper

We propose to obtain NIC3/F160W imaging of three new IRAC-selected galaxy clusters at 1.3 < z < 1.5. In combination with deep ACS/F850LP images being obtained in Cycle 14, the resulting precision photometry in a rest ~U - R color will allow us to construct color-magnitude diagrams which can be used to measure the slope and scatter in the red sequence galaxies, thereby constraining the history of star formation in the early-type galaxies. The number of morphologically-selected early-type galaxies more luminous than L* will allow us to test the predictions of the hierarchical merging scenario for galaxy formation in clusters at the highest available redshifts in galaxy clusters.

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