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Astrophysics Colloquium

Witnessing the Dynamics of Planetary Assembly
Presented by Richard Teague
Harvard-Smithsonian Center for Astrophysics

Thursday, November 21, 2019
11:00 A.M. in 169-336

ALMA has driven a revolution in our understanding of the physical structure of protoplanetary disks. Substructures, such as gaps and rings, appear ubiquitous and are highly suggestive of dynamical processes sculpting the dust distribution. In the background, another revolution has been occurring: high spatial and spectral observations of molecular emission to trace the gaseous component of the disk and, in particular, the dynamical processes thought to sculpt the dust. In this talk I will review the progress we have made in understanding the dynamical structure of protoplanetary disks. I will show how we can exploit this dynamical structure to search for weak line emission, measure the 3D geometry of the disk and recover lab-quality spectra. Studies searching for non-Keplerian motions, indicative of planet-disk interactions, have also made tremendous progress. I will review current observations where we believe we have located embedded planets due to their influence on the local gas dynamics, and discuss future prospects of ALMA as a planet-hunting instrument.

JPL Contact: Neal Turner (3-0049)

SVCP Astrophysics

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