Gas dynamics in outer regions of protoplanetary disk

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• Can Cui - DAMTP, Cambridge
• Monday 15 March 2021, 14:00-15:00
• Online.

If you have a question about this talk, please contact Cleo Loi.

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While gas dynamics have been studied in local and global numerical simulations for inner regions (<10AU) of protoplanetary disks (PPDs), global simulations applicable to outer regions (>30AU) of PPDs are still lacking. On the other hand, it is revealed in the recent years that the magneto-rotational instability (MRI) is damped or suppressed in a large part of the disk, and hydrodynamic instabilities become crucial to drive turbulence in PPDs. In this talk, I will present our recent results on gas dynamics of outer PPDs through global 2D and 3D non-ideal MHD simulations by Athena++, focusing on the turbulence driven by Vertical Shear Instability (VSI) – one of the most promising hydrodynamic instability in PPDs – under the influence of the non-ideal MHD effects, and the spontaneous magnetic flux concentration that leads to the formation of annular substructures commonly detected with Atacama Large Millimeter/submillimeter Array (ALMA).

This talk is part of the DAMTP Astrophysics Seminars series.

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