S19B0079abst
S19B0079
We propose to use Subaru/FOCAS and Gemini/GMOS-N to spectroscopically confirm the nature of a large sample of binary quasars having a projected separation <30 kpc, an extremely rare population. With the Subaru Hyper Suprime-Cam Strategic Survey Program, we have identified a population of SDSS quasars as having two components of nearly equal brightness. While FOCAS is efficient at providing separate spectra for each component of a binary at 1.2′\ ′ < θ <3′\ ′, GMOS-N in queue mode is needed for those with θ < 1.2′\ ′. With the first statistical sample of spectroscopically-confirmed binary quasars, we will measure their frequency and evolution of such systems up to z∼3 with a comparison to predictions from recent hydrodynamic cosmological simulations. These results will place important constraints on the merger simulations of galaxies and their supermassive black holes that are input to an estimate of gravitational wave events to be detected by LISA. Furthermore, our results will provide remarkable laboratories for studying the fueling of binary supermassive black holes with other instruments such as ALMA and JWST.
This document was translated from LATEX by HEVEA.