Poster Presentation
"Brick" or "Mist"? Investigating Cold Gas Dynamics in Cool-core Galaxy Clusters
Presenter: Yi-Yang Li (National Tsing Hua University (NTHU))
Cold gas (T~10^4 K) nebular structures with optical emissions were found around central regions of some cool-core (CC) galaxy clusters. We aim at comparing the results between the observations of CC clusters and our simulations in order to interpret the dynamics of cold gas in the clusters. Hydrodynamic simulations with two different configurations of gas properties, modeled as "Brick" or "Mist", are performed to trace gas kinematics. We find that the Mist simulation presents larger variations in both line-of-sight (LOS) velocity and velocity dispersion evolution, while the Brick simulation shows quiescent gas velocities. The Mist model, which assumes that cold gas dynamics is coupled with the hot gas motions, is more consistent with the observational data with LOS velocity up to 600 km/s and velocity dispersion up to 400 km/s.
asiaa.sinica.edu.tw