Speaker
Description
Cluster mergers are a compelling subject of study as they offer an excellent opportunity to investigate the characteristics and behavior of both dark matter and the intracluster medium. These mergers are typically identified through X-ray observations, which enable the location of the hot gas in the intracluster medium to be determined. We aim to reconstruct the dynamic history of the Abell $2147$ collision, reproducing its observed features. The cluster, located at $\bar{z} = 0.0451$, comprises two substructures: Abell $2147$ South and Abell $2147$ North, with a mass ratio of approximately $1:2$, and they are separated by approximately $\sim 1100$ kpc. To reconstruct the dynamic history, we used hydrodynamic simulations to investigate three collision scenarios: pre-merger, outgoing, and incoming. Preliminary results indicate that the optimal models were those that considered a collision occurring near the plane of the sky. In the pre-merger scenario, the central passage will occur in $0.42$ Gyr, we obtained a good approximation of the temperature map for the Abell $2147$ South. In the outgoing scenario, with the time since the collision of $0.85$ Gyr, we achieved a satisfactory structure of the temperature map, but the temperatures were too low. For the incoming model, the time since the collision was too long, approximately $4.2$ Gyr, which resulted in significant gas cooling. Additionally, for all scenarios, the maps of the projected mass (gas and dark matter) closely resemble the observed galaxies.
