PI: Thomas P. Kling, Bridgewater State University, firstname.lastname@example.org
Address: Department of Physics, Bridgewater State University, Bridgewater, MA 02325, USA
CoI: Ian Dell'Antonio, Brown University
CoI: Paul Huwe, Brown University
Title: Uncovering the Distribution of Star Formation in z=0.25 Galaxy Clusters
Abstract: We propose to use the Rhoads 820R (k1047) and WR CIII (k1021) filters to detect both the H(alpha) and O[II] emission from star- forming galaxies in three rich galaxy clusters at z=0.25: Abell 1835, Abell 2070, and Abell 992. We will measure star formation rates as low as 0.2 solar masses/year from the H(alpha) narrow band flux excess for galaxies as faint as i_AB=24.0, using the coincidence of two narrow band flux excesses to confirm cluster membership. This will allow us to extend measurements almost an order of magnitude lower in star formation rate and two magnitudes fainter in galaxy luminosity over the current limits obtained for intermediate-redshift clusters. Using the coincidence of both filters will allow us to efficiently exclude line emission from background galaxies while capturing star formation from 60% to 80% of the cluster galaxies. We will study the spatial distribution of the star formation in these faint cluster members as a way of experimentally determining the effect of the intra-cluster environment on these galaxies and to obtain a complete picture of star formation in these clusters.