PI: Tingting Liu, U. of Maryland, email@example.com
Address: Department of Astronomy, College Park, MD, 20742 Phone, 301-405-3001 USA
CoI: Suvi Gezari, U. of Maryland
Title: Spectroscopic Follow-Up of Variability Selected Binary Supermassive Black Hole Candidates
Abstract: Hydrodynamical simulations of a binary supermassive black hole system show that mass accretion onto the circumbinary disk could be strongly modulated due to the binary’s orbital motion, or could be susceptible to relativistic Doppler effects, both of which would result in periodic variability in luminous quasars. Motivated by the science goal of searching for such variability signatures and to continue our approved Gemini 2015A and 2015B programs, we selected 1 more periodically variable quasar candidates in the Pan-STARRS1 (PS1) Medium Deep (MD) 04 field, which do not have archival spectra. Spectra are a critical component of our study, because they are necessary to constrain the total black hole mass of the binary candidate systems, thereby allowing us to translate orbital periods to orbital separations, and to determine the strength of their gravitational wave signal.
Program Type: Standard/Extragalactic
Run 1 (2016A): GEM-SQ/GMOSS -- 1.6hrs band 2 (GS-2016A-Q-56)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360