2024年3月03日, 星期日

【DoA Seminar talk】December 28th by Jinning Liang

日历
研讨会日历
Date
12.28.2023 4:00 pm - 5:00 pm

Description

Title: Dark-matter properties and its connection with galaxy morphology 

Speaker: Jinning Liang 

 
Abstract: From dwarf galaxies to brightest cluster galaxies, their dark matter halos contain valuable information of formation and evolution history. Therefore, relating stellar content with dark matter properties to study galaxies by using semi-analytical models and numerical simulations becomes a popular method. In this talk, I will firstly present our work focusing on constraining dark matter distribution of a remarkable example of ultra diffuse galaxies by using semi-analytical model of globular cluster dynamical evolution. I will show this method can be applied to any GC-rich dwarf galaxies. Secondly, I will show how galaxy morphology and dark matter halo structures can be connected by using our novel kinematic decomposition method in cosmological simulations. The widely used kinematic criterion for distinguishing thin and thick discs with a constant threshold of orbital circularity will be shown to be oversimplified. On the contrary, the circularity threshold for thin discs, as well as the energy threshold for separating the stellar halo and the dynamically colder galaxy, both depend on halo mass and environment. Connections between galaxy size and halo structural parameters will also be presented. 

 

 
Bio: Jinning Liang is a PhD student in Institute for Computational Cosmology at Durham University working with Prof. Cedric Lacey. His research interests include AGN feedback, galaxy formation theory, galactic dynamics, galactic chemical evolution, cosmology, numerical simulation and semi-analytical model. He is now mainly focusing on building AGN-wind feedback model in cosmological simulations and studying the connection between AGN feedback and galaxy content. He obtained bachelor degree at Wuhan University and was a research assistant at KIAA and SHAO.  

 

 

Time: 16:00-17:00PM, 28/Dec, Thursday 

Venue: Room 508 (large seminar room), Department of Astronomy