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Matter and Electromagnetic Fields in Strong Gravity
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Matter and Electromagnetic Fields in Strong Gravity
CSIC Building (#406),
Seminar Room 4122.
Directions: home.cscamm.umd.edu/directions
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Three-Dimensional GRMHD Simulations of Accretion Disks around
Spinning Black Holes
Ramesh Narayan
Harvard University
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Abstract:
We describe global 3D GRMHD simulations of steady accretion
disks around black holes. We have simulated models with a range of
disk thicknesses and black hole spin parameters, both with and without
a simplified radiative cooling prescription. As the disk thickness
and/or the black hole spin increases, the inner regions of our
simulated disks deviate increasingly from the idealized thin disk
model of Novikov and Thorne (1973). We discuss implications for
attempts to measure spin parameters of black holes by modeling the
radiation emitted by their accretion disks. |
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