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Aspects of Dust and Planets in Discs

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If you have a question about this talk, please contact Jean Teyssandier.

Recent work has shown that accretion heating in the inner regions of protoplanetary disks can lead to a particle trap, driven by a modification of the drag force due to temperature gradients referred to as ‘photophoresis’. I will discuss this and the underlying aspects of diffuse gas aerodynamics of solid particles in application to protoplanetary disks. These models also highlight several areas where the state of the art could be significantly improved. I will then present preliminary work on low mass planet migration torques in non-ideal MHD disc models, were results suggest the torques in the ‘dead-zone’ may still be significantly modified by magnetic fields, even when the magnetic diffusivity is very large.

This talk is part of the DAMTP Astro Mondays series.

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