Poster abstract
The early dynamical evolution of Eta-Chamaeleontis
Abstract
Eta Chamaeleontis is a remarkable young (~9 Myr) association. It is sparse and compact (18 systems are concentrated in a 1 pc radius), and presents a mass function that is comparable to other rich open clusters in the mass range 0.15-4 Msun. However it presents some non standard mass distribution features (deficit of low mass stars and brown dwarfs, lack of wide binaries, mass segregation).
Moraux et al. (2007) performed N-body simulations and found that these properties can result from dynamical evolution, when starting with a "universal" log-normal IMF but a very compact configuration.
In this poster, we present new N-body numerical simulations of the early dynamical evolution of Eta-Cha. More realistic initial conditions taking into account the presence of primordial binaries, cluster substructures and/or subvirial conditions have been tested.
Moraux et al. (2007) performed N-body simulations and found that these properties can result from dynamical evolution, when starting with a "universal" log-normal IMF but a very compact configuration.
In this poster, we present new N-body numerical simulations of the early dynamical evolution of Eta-Cha. More realistic initial conditions taking into account the presence of primordial binaries, cluster substructures and/or subvirial conditions have been tested.