Speaker
Description
Galaxy cluster mergers are energetic events, where the shock front can reach temperatures of tens of keV. AS0592, located at $z=0.22$, is likely a binary galaxy cluster merger aligned along the line of sight. Using deep Chandra observations (totaling 100 ks) and $N$-boby hydrodynamic simulations, we investigate the dynamical evolution of AS0592. The X-ray data reveal two peaks in the brightness distribution and two cool cores in the temperature map. The global gas temperature is $\sim 9.7$ keV; the main cluster exhibits a strong cool core ($T \sim 4$ keV), while the subcluster has a weaker cool core ($T \sim 5$ keV). We present two collision scenarios to investigate the cluster dynamics. The incoming scenario, with $TSC = -0.08$ Gyr, reproduces the global temperature and the distances between the gas peaks; however, it does not capture the cone shape of the secondary cluster, and the cool core of the secondary was cooler than expected. In the outgoing scenario, at $TSC = 0.34$ Gyr, we achieve agreement with the distance between the gas peaks and observe an asymmetry in the gas density of the secondary cluster, but the temperature map does not match well with observations. Given the available observational constraints, we do not have enough information to definitively determine the best model. Our results allow us to discuss partial agreements with the observations.
