Abstract / Description of output
The observational characterization of the internal kinematics of Galactic globular clusters will soon reach an unprecedented level of richness, thanks to the synergy between the astrometric data provided by Gaia and HST, and a number of ESO/VLT spectroscopic programs. Such a wealth of information on the three-dimensional velocity space of star clusters, offers the unique opportunity to address a number of open questions on the phase space evolution of collisional stellar systems.Driven by these motivations, I will present some highlighted results of a large survey of N-body simulations aimed at exploring the long-term dynamical evolution of the kinematical properties of tidally limited star clusters. First, I will discuss of the evolution of the anisotropy in velocity space, with particular attention to the dependence on the cluster initial structural properties and dynamical history. I will then focus on the implications of cluster dynamical evolution and loss of stars on its internal rotation. Such an enriched picture of the kinematical properties of star clusters offers a solid bedrock for addressing a range of exciting new questions related to the dynamics of multiple stellar populations in globular clusters. In this context, I will illustrate some results on the internal rotational velocity profiles and the evolution of the differences in the rotation of different stellar populations.
|Published - 31 May 2016