***********************************************************
OATS-UNI/TS SEMINAR
***********************************************************
Speaker: Ana Laura Serra (INAF Torino)

Title: Mass estimate and membership identification in clusters of galaxies through the caustic technique
Date: Wednesday, September 26th, 2012
Time: 11:30
Venue: Villa Bazzoni
***********************************************************
Abstract: The caustic technique uses galaxy redshifts alone to measure the escape velocity profiles of galaxy clusters to clustrocentric distances beyond their virial radius, where dynamical equilibrium does not necessarily hold. This feature allows us to estimate the mass profile and to identify the members of galaxy clusters up to 4r200. We briefly review the available methods for estimating the mass profile and for identifying members in clusters and we focus on the analysis of the ability of the caustic technique to extract these dynamical properties. We study its possible systematic errors, by applying it to a large sample of simulated clusters with M200 larger than 10^14 Msun/h extracted from a cosmological hydrodynamical simulation of a LCDM universe.
***********************************************************
Contact: Andrea Biviano (OATS)