Dual AGN Across Cosmic Time

We propose to carry out a large, uniform, survey for dual AGNs in distant galaxies using archival Chandra surveys. Currently, there is no systematic study of the evolution of dual AGN at high-z; and observational constraints on the dual AGN fraction in the nearby universe are higher than predicted from simulations, resulting in an inconsistent expected dual AGN rate at z>1. We will be able to accurately determine the dual AGN rate (<0.5%), as well as a measure the dual AGN fraction as a function of redshift (<2%). Our tight constraint on the dual AGN fraction as a function of z will allow us to statistically differentiate between the low- and high-end predictions for the fraction of dual AGN across cosmic time.