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Astrophysics Colloquium

Using Disk Substructures to Reveal the Young Planet Population
Presented by Zhaohuan Zhu
Department of Physics and Astronomy, University of Nevada, Las Vegas

Thursday, September 26, 2019
11:00 A.M. in 169-336

ALMA provides us a great opportunity to image the planet construction zone directly, and many disk structures (e.g. spirals, gaps, warps) have emerged. In this talk, I will discuss how planet-disk interaction theory helps us understand planet formation processes. Then, I will apply the theory to substructures in the ALMA large program DSHARP to reveal the potential young planet population. We find that the occurrence rate for >5-Jupiter-mass planets beyond 5-10 AU is consistent with direct imaging constraints. Using these disk substructures also allows us to probe a wide-orbit planet population (Neptune- to Jupiter-mass planets beyond 10 AU) that is not accessible to other planet searching techniques. Finally, I will discuss one possible solution to the planet mass budget problem, the puzzle revealed by ALMA that Class II disks appear to contain too little dust to be the source of the solids in exoplanets.

JPL Contact: Neal Turner (3-0049)

SVCP Astrophysics

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