8-12 juin, 2014


Counter-rotating stellar populations in major mergers remnants

Simon Richard (Université Laval)

H. Martel, D. Kawata

The formation of structures in modern cosmology implies a hierarchical scenario where the current masses of galaxies are attributed to their merger histories. In this scenario, the formation of large spiral galaxies can be a problem, because collisions between structures of comparable masses tend to form early-type objects. Recent results suggest that a solution to this problem may come from the presence of a large gas reservoir at the time of interaction thereby retaining a spiral morphology after the initial progenitors have merged. In a series of simulations of gas-rich major mergers, the presence of a massive counter-rotating stellar population within the disc is studied. Results will be presented concerning the structure, kinematics and chemical signature of these populations.
(doit être confirmé par le SOC)