Astronomy Colloquium Series Presents
Dr. Zhaohuan Zhu, Assistant Professor, Department of Physics and Astronomy, University of Nevada, Las Vegas
“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. I will summarize planet-disk interaction theory and highlight some recent theoretical developments in the field. Then, I will present our systematic study on planet-disk interaction using numerical simulations including both gas and dust components. These simulations have been used to constrain the properties of 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.
Please note: Should you require any reasonable accommodations to ensure equal access and opportunity related to this event please contact Stacy Tiburzi at 734-764-3440 or stibu@umich.edu.
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. I will summarize planet-disk interaction theory and highlight some recent theoretical developments in the field. Then, I will present our systematic study on planet-disk interaction using numerical simulations including both gas and dust components. These simulations have been used to constrain the properties of 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.
Please note: Should you require any reasonable accommodations to ensure equal access and opportunity related to this event please contact Stacy Tiburzi at 734-764-3440 or stibu@umich.edu.
| Building: | West Hall |
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| Website: | |
| Event Type: | Lecture / Discussion |
| Tags: | Astronomy, Climate and Space Sciences and Engineering, Lecture, Physics |
| Source: | Happening @ Michigan from Department of Astronomy, Department of Physics, Michigan Institute for Research in Astrophysics |
