Extended MHD models for black hole accretion

Series: 
Astronomy Unit Seminars
Speaker: 
Charles Gammie
Host: 
Sijme-Jan Paardekooper
Date: 
December 4th, 2015 at 14:30
Room: 
GO Jones Room 610
Abstract: 

The Event Horizon Telescope will soon produce resolved images of the low accretion rate black holes in the galactic center and M87. These flows are expected to be hot, magnetized, and collisionless, yet are commonly modeled using ideal MHD.  To evaluate the limits of ideal MHD we have formulated, solved, and applied a covariant nonideal (or extended) MHD model.  I will describe the model and results from simulations, as well as the future of modeling Event Horizon Telescope targets.