Figure 1: This plot summarizes the new paradigm for Early-Type galaxies indicated by the ATLAS3D study of the stellar kinematics. See Sky & Telescope and Physics World for a simple description of our findings and our MNRAS Paper for the full details.
ATLAS3D Project (Cappellari et al. 2011) combines a multi-wavelength survey of a
complete sample of 260 early-type galaxies within the local (42Mpc)
volume (1.16×105 Mpc3) with numerical simulations and semi-analytic
modeling of galaxy formation. This project aims to quantify the global stellar kinematics
and dynamics of a statistically significant sample of objects to
characterize the class of early-type galaxies, and relate this to
their formation and evolution. Combining the stellar populations
diagnostics from the multi-wavelength coverage, the ATLAS3D Project
will derive the star formation history probing the mass-assembly
epochs and timescales. In addition, the project will characterise the
different phases of the interstellar medium linking the kinematics of
molecular, atomic and ionised gas with the dynamical structure, star
formation and environment of the host galaxies.