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Revealing Young Planet Population from ALMA Large Program-DSHARP

Despite thousands of planets have been discovered, these planets are billions of years old and we know little about their formation processes. To understand planet formation, we need to study young planets which are still growing in protoplanetary disks. Ideally, we would like to know both the properties of each young planet and the demographics of the young planets as a single population. ALMA Large Program-DSHARP has provided us unprecedented images of 20 protoplanetary disks, each with the resolution that is the same as the famous HL Tau ALMA image. A variety of disk features have been revealed and many of them are consistent with features induced by young planets in disks. To explore the potential planet population that is responsible to these disk features, we have systematically carried out planet-disk interaction simulations including both gas and dust components. We have laid out the procedure to constrain the planet properties using disk features, and studied the potential planets in DSHARP disks. I will highlight some of the findings, including one system with remarkable agreements between the observation and theory. Finally, I will present the demographics of the derived young planet population from the DSHARP sample, compare it with the demographics of known exoplanets, and discuss its implications to the planet formation theory.

Speaker: Zhaohuan Zhu, Univ of Nevada, Las Vegas

Monday, 10/15/18


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Campbell Hall, Rm 131

UC Berkeley
Berkeley, CA 94720