Study of EDisCS galaxy clusters

We present the star-forming main sequence for 163 galaxies in four EDisCS clusters in the range 0.4 < z < 0.7. We use Hubble Space Telescope/Wide Field Camera 3 observations of the H_{alpha}_ emission line to span three distinct local environments: the cluster core, infall region, and external field galaxies.

The main sequence defined from our observations is consistent with other published H_{alpha}_ distributions at similar redshifts but differs from those derived from star formation tracers such as 24 {mu}m. We find that the H_{alpha}_-derived SFRs for the 67 galaxies with stellar masses greater than the mass-completeness limit of M* > 109.75 M_{sun}_ show little dependence on environment. At face value, the similarities in the SFR distributions in the three environments may indicate that the process of finally shutting down star formation is rapid, however, the depth of our data and size of our sample make it difficult to conclusively test this scenario.