Conveners
halo: stellar & gas
- Peng Wang (SHAO)
In cosmological structure formation, objects ranging from compact binaries to satellite galaxies evolve on bound orbits while they interact gravitationally with the surrounding matter distribution. In this talk, I will present an analytic approach to the dynamical friction acting on circularly moving point masses in a gaseous medium. I will show how it can be extended to dark matter...
We use a 500 cluster sample from the HectoMAP redshift survey combined with the IllustrisTNG 300-1 simulation to explore the evolution of cluster members and their host clusters. We use the central stellar velocity dispersions, a fundamental observable that links galaxies with their dark matter subhalos. For a fair comparison with observed stellar velocity dispersions, we carefully examine the...
Massive central galaxies ($M_\star>10^{11.2}M_\odot$) in clusters and their satellites offer insights into the assembly history of their host massive dark matter halos that are crucial for cosmology. Therefore, it is necessary to establish a clear picture of their galaxy-halo connection. Recent works using deep image and weak lensing suggest that the stellar mass in the outskirt of massive...
The distribution of baryons provides a significant way to understand the formation of galaxy clusters by revealing the details of its internal structure and changes over time. I will present theoretical studies on the scaled profiles of physical properties associated with the baryonic components, including gas density, temperature, metallicity, pressure and entropy as well as stellar mass,...
