Studying Galaxy Evolution in High Redshift Large-Scale Structures with the ORELSE Survey
Dale Kocevski (UC Davis)
I will present current results from the ORELSE survey, an extensive multiwavelength study into the mechanisms that drive galaxy evolution in and around large-scale structures at high redshift. The first phase of the survey is a systematic search for structure on scales greater than 10 Mpc around 20 known galaxy clusters at redshifts of 0.6 < z < 1.3. When complete, the ORELSE survey will cover nearly 5 square degrees, all targeted at high-density regions, making it complementary to field surveys such as DEEP2 and COSMOS. I will describe the large-scale structures that have thus far been photometrically and spectroscopically confirmed and focus in particular on the Cl1604 supercluster at z = 0.9, which contains at least eight clusters and spans roughly 10 Mpc on the sky and 100 Mpc in depth. To date, the Cl1604 supercluster is the largest structure mapped at z~1, with the most constituent clusters and the largest number of spectroscopically confirmed member galaxies. I plan to describe the complex three-dimensional structure of the supercluster, the properties of its member galaxies as a function of environment, and the system's large population of active galaxies detected through radio, mid-IR, and X-ray observations. After examining the optical properties of these galaxies, implications on AGN feedback as a possible mechanism to quench star formation and accelerate galaxy evolution within the system will also be discussed.
Contact: J. Rigby
Dale Kocevski (UC Davis)
I will present current results from the ORELSE survey, an extensive multiwavelength study into the mechanisms that drive galaxy evolution in and around large-scale structures at high redshift. The first phase of the survey is a systematic search for structure on scales greater than 10 Mpc around 20 known galaxy clusters at redshifts of 0.6 < z < 1.3. When complete, the ORELSE survey will cover nearly 5 square degrees, all targeted at high-density regions, making it complementary to field surveys such as DEEP2 and COSMOS. I will describe the large-scale structures that have thus far been photometrically and spectroscopically confirmed and focus in particular on the Cl1604 supercluster at z = 0.9, which contains at least eight clusters and spans roughly 10 Mpc on the sky and 100 Mpc in depth. To date, the Cl1604 supercluster is the largest structure mapped at z~1, with the most constituent clusters and the largest number of spectroscopically confirmed member galaxies. I plan to describe the complex three-dimensional structure of the supercluster, the properties of its member galaxies as a function of environment, and the system's large population of active galaxies detected through radio, mid-IR, and X-ray observations. After examining the optical properties of these galaxies, implications on AGN feedback as a possible mechanism to quench star formation and accelerate galaxy evolution within the system will also be discussed.
Contact: J. Rigby