Events
【DoA Seminar】July 13th by Xunchuan Liu (Leiden)
Description
Title: Turbulence and star formation across clouds and galaxies
Speaker: Xunchuan Liu (Leiden)
Abstract:
Turbulence dominates the early evolutionary phases of interstellar clouds, driving the development of filamentary structures in HI clouds, the formation of transitional clouds, and the mass function of star-forming regions. In this talk, I will share my perspective on how turbulence operates from both theoretical and observational standpoints. Specifically, I will present my recent work utilizing the 100 deg2 PPCOS CO survey of the Polaris Flare. Our results demonstrate how pure Kolmogorov turbulence persists from 20 pc down to below 0.1 pc. Within this regime, the density field exhibits multi-fractal structures while the underlying turbulent mode remains unshifted. Additionally, I will discuss how dust couples with HI and CO gas during these early evolutionary stages. I will also outline my view on how dense clumps act as the primary drivers governing star/cluster formation patterns across the Milky Way and the Large Magellanic Clouds (LMCs).
Bio:
Dr. Xunchuan Liu (刘训川) is a Postdoctoral Researcher at Leiden University (2024–present), collaborating with professors Ewine van Dishoeck and Michiel Hogerheijde. He earned his Ph.D. from Peking University in 2021 and subsequently completed his first postdoctoral fellowship at the Shanghai Astronomical Observatory (2021–2024). His research focuses on turbulence theory and observations, star formation in the Milky Way and nearby dwarf galaxies, and the dynamics of diffuse (HI, CO, and ionized) clouds.
Time: 10:00-11:00, 13/July, Monday
Venue: Room 502 (Small seminar room), Department of Astronomy
Venue: Room 502 (Small seminar room), Department of Astronomy
You can also access the seminar via：
#腾讯会议：641-788-623
