disk

StreamingInstabilityProtoplanetary Disks

I am studying the structure and evolution of protoplanetary disks, particularly related to the accretion of gas onto the central star. The magnetorotational instability (MRI) generates turbulence that transports angular momentum outwards. However, protoplanetary disks contain large regions of low ionization, in which three effects dominate: Ohmic diffusion, ambipolar diffusion, and the Hall effect. Exactly how these effects influence the efficiency of MRI-driven accretion in these disks is a primary focus of my work.

Current Projects

Observing disk turbulence with ALMA

ALMA observations of disk structure

Planetesimal formation

Planet formation

Magnetohydrodynamic turbulence in protoplanetary disks

Athena code development

Past Projects

Mesoscale structures in MRI-driven turbulence

Outbursts in disks around young stars

 

 

 

 

 

JILA, University of Colorado
440 UCB
Boulder, CO 80309

contact1a1

303-546-0032

jbsimon.astro@gmail.com

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