Understanding Cluster Formation and Galaxy Evolution ... ORELSE

Prof. Lori Lubin (UC Davis)
Tuesday, March 3, 2020 - 11:00am

The Observations of Redshift Evolution in Large Scale Environments (ORELSE) Survey is a systematic photometric and spectroscopic search for structure on scales > 10 Mpc around 18 known clusters at 0.6 < z < 1.3.  The survey covers 5 square degrees, all targeted at high-density regions, making it comparable in area and spectral coverage to field surveys such as DEEP2.  The goal of survey is to study galaxy evolution across all scales -- from dense cluster cores to infall/intermediate-density regions to the field. In this talk, I describe the survey design, the galaxy sample, and our novel environmental metrics. I present some recent results on using the large galaxy sample to create a quantifiable cluster catalog, measure galaxy properties as a function of stellar mass, environment, and redshift, and constrain the nature of the active galaxy population. Finally, I describe our latest program to combine ORELSE with the higher-redshift survey VUDS to chart cluster formation and its effect on member galaxies over the last 12 billion years.

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