Understanding the saturation of magneto rotational instability in accretion disks/Seminar Series 19

Speaker: Dr.Mir Abbas Jalali

Affiliation: Mechanical Engineering Department,Sharif University of Technology
Title:

 Understanding the saturation of magneto rotational instability in accretion disks

Date: 8 June 2011
Place: Seminar Series, Astronomy School, IPM

abstract:

The governing magnetohydrodynamics equations of thin accretion disks

around black holes admit a set of unstable solutions, which are called

magneto rotational instabilities (MRI). The instabilities grow exponentially

for the inplane components of the velocity and magnetic field. Numerical

simulations, however, show that instabilities can be saturated due to

nonlinear effects though its exact physical mechanism is far from being

completely understood. After reviewing the literature, I introduce some

analytical and numerical procedures that may provide new insight into

the problem.