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Not All Who Wander are Lost: Supermassive Black Hole Mergers and Dual AGN in the Romulus Simulations

Event Details

Event Dates: 

Friday, October 14, 2016 - 12:00pm

Seminar Location: 

  • JILA 10th Floor - Foothills Room

Speaker Name(s): 

Michael Tremmel

Speaker Affiliation(s): 

University of Washington
Seminar Type/Subject

Scientific Seminar Type: 

  • Astrophysics Lunch Seminar

Event Details & Abstract: 

Using a flagship set of high resolution cosmological simulations, called Romulus, I predict the rate, properties, and host halos of supermassive black hole (SMBH) mergers and the dual AGN that precede them. Romulus includes a novel approach to SMBH sub-grid physics: Forming SMBHs from pristine high redshift gas, physically motivated tracking of SMBH orbits to sub-kpc accuracy, and including the effect of angular momentum support on SMBH accretion (Tremmel+ 2015, 2016). SMBH dynamics and accretion naturally respond to the changing structure of galaxies during merger events. Utilizing this advantage, I present a self-consistent prediction for SMBH mergers and their host galaxies. Following the growth history of merging SMBHs, I find that a significant fraction of SMBH mergers