The entangled fate between galaxies, their ambient gas and larger-scale environments

Connections between the circumgalactic medium (CGM) gas accretion and the galaxy central star formation has long been inspected. In a series of two papers, we put this interlink between the CGM and star formation into a framework on a larger scale (several hundreds of kpcs), i.e., the merging environment of neighbouring galaxies. Such an environment, to a certain degree, maps out various paths for galaxy interactions including mergers and fly-bys. In this series, we use the IllutrisTNG-100 simulation to demonstrate that this environment can modulate the CGM gas angular momentum, resulting in either enhance or prohibit star formation inside the galaxy.

Dandan XU (Tsinghua University)
Yingjie Peng
Thursday, December 2, 2021 - 3:30PM to Thursday, December 2, 2021 - 4:30PM
B.S from PKU, PhD from University of Manchester. Postdoc at NAOC, Bonn University, Heidelberg Institute for Theoretical Studies. 2018 autumn, jointed the Tsinghua University, now at Department of Astronomy.