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March 20 at 4PM in the 2nd Floor Conference Room in Dearborn Speaker: Michele Trenti (STScI) “Dynamical Evolution of Star Clusters with Primordial Binaries and Intermediate Mass Black Holes” The evolution of a star cluster is strongly influenced by the presence of primordial binaries and of a central black hole, as dynamical interactions within the core prevent a deep core collapse under these conditions. I will present the results from a large set of direct N-body simulations of star clusters that include an intermediate mass black hole (IMBH), single and binary stars. I will highlight the structural and dynamical differences for the various cases showing in particular that on a timescale of a few relaxation times the density profile of the star cluster does no longer depend on the details of the initial conditions but only on the efficiency of the energy generation due to gravitational encounters at the center of the system. In addition, the dense cores of these systems are natural laboratories for stellar dynamics and frequent multiple interactions lead to the formation of hierarchical systems allowing us to predict the abundance of triple stars in globular clusters, in particular with one member of the triple being a pulsar. |