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Astronomy Colloquium (2017 Spring Semester)

* Date
May 23
* Speaker
Kwang-Ho Park (Georgia Tech)
* Title
Feedback-regulated fueling of massive black holes
* Abstract
 

 

Accretion of gas and the interaction of matter and radiation are at the heart of many astrophysical questions pertaining to black hole growth and the coevolution of massive black holes and their host galaxies. Thus, numerical simulations of radiation-regulated accretion onto black holes are essential in understanding how the ionizing radiation that emanates from the innermost regions of the BH accretion flow couples to the surrounding medium and how it regulates the BH fueling. In this talk, I will discuss the roles of radiative feedback in regulating gas accretion onto massive black holes. In particular, I will present our recent progress on 1) radiation-driven turbulent accretion flow using 3D radiation-hydrodynamic simulations with Enzo + Moray, 2) gaseous dynamical friction for black holes in supersonic motion, and 3) dusty accretion onto massive black holes and infrared diagnosis of Eddington ratio.
 
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