Program: GN-2014A-Q-104

We propose to use GMOS-N to obtain high signal-to-noise spectra of a total of 60 galaxies in the two most massive galaxy clusters at z<0.1, Abell 2029 and Abell 2142. Together with SDSS data of galaxies in these clusters, the data will for the first time make it possible determine ages, metallicities, abundance ratios and dynamical masses of bulge-dominated galaxies from the brightest cluster members down to low mass (~10^10.3 M_sun) galaxies in these massive clusters. The data will be used to establish possible differences between rich clusters at z~0 as we have similar data for Coma and Perseus. Further, such data are instrumental to obtaining the full understanding of our similar spectroscopy of galaxies in high redshift rich clusters out to z=2, and therefore to understanding the evolution of galaxies leading to the passive bulge-dominated galaxies in rich clusters at z~0. The program can be carried out in poor conditions with Gemini North.