Speaker:
Yan-Fei Jiang
Institution:
UC Santa Barbara
Date:
Tuesday, May 7, 2019
Time:
4:00 pm
Location:
NS2 1201
Abstract:
Black hole accretion disks convert the gravitational energy of accreted gas to photons and produce varies observational phenomena of AGNs. First principle calculations of black hole accretion disks are not only important for understanding the observational properties of accreting black hole systems, but can also improve our understanding on the growth of black holes as well as connections between the central black holes and the host galaxies. I will describe our recent 3D radiation MHD simulations of accretion disks covering a wide range of mass accretion rates. I will show how these simulations can self-consistently explain the formation of coronae as well as many observed properties of AGNs. I will also describe how the structures of disk will change when the accretion rate is above the Eddington-limit and astrophysical implications of these simulations.
Black hole accretion disks convert the gravitational energy of accreted gas to photons and produce varies observational phenomena of AGNs. First principle calculations of black hole accretion disks are not only important for understanding the observational properties of accreting black hole systems, but can also improve our understanding on the growth of black holes as well as connections between the central black holes and the host galaxies. I will describe our recent 3D radiation MHD simulations of accretion disks covering a wide range of mass accretion rates. I will show how these simulations can self-consistently explain the formation of coronae as well as many observed properties of AGNs. I will also describe how the structures of disk will change when the accretion rate is above the Eddington-limit and astrophysical implications of these simulations.
Host:
Paul Robertson