Title：Understanding evolution of protoplanetary discs from observations and modelling

Speaker：Simin Tong (University of Leicester)

Time: 2:00pm, Dec 12th (Thursday), 2024

Tencent Meeting: 768-499-951 password: 6360

Location: Middle conference room, 3rd floor

Abstract：

The protoplanetary disc is the birth place of planets and the material provider for its central star. Composed of gas and dust, both components can now be observed in high resolution using the Atacama Large Millimeter Array (ALMA). These observations reveal the diversity of discs in dust/gas morphologies and properties of discs, shaped by a combination of intrinsic and extrinsic factors. In this talk, I will present the understanding of long-term disc evolution through observations and modelling. The talk will cover: a) the ALMA disc survey in the Serpens star-forming region and its implications for environmental effects; b) a new mechanism for forming radially compact discs, with and without ring-like structures, and c) the possibilities of distinguishing between two mechanisms driving disc evolution—viscosity and magnetised winds—by measuring gas disc sizes.

CV：

Simin Tong is a third-year PhD student at the University of Leicester, working with Prof. Richard Alexander. Her research primarily focuses on understanding the long-term evolution of discs through modeling and observations. Before pursuing her doctoral studies, she completed her Master's degree at Leiden Observatory and her Bachelor's degree at Jilin University.