What is the role of the environment in shaping early-type galaxy sizes? Did it changed in the last 10 Gyr?
Understanding galaxy evolution requires understanding the impact of cosmic time, environment, mass, and halo growth at least, because likely a combination of them leads to the quenching of star formation and the emergence of the galaxy populations we see in the nearby Universe. In the talk, I will present the picture coming out from two mass-selected samples of red-sequence early-type galaxies in the general field and in clusters over the redshift range 0<z<2. With this sample, I isolated the effects of the halo in which galaxies are embedded and whether its role has changed in the last 10 Gyr.
About the talk
INAF, Osservatotio Astronomico di Brera, Italy