How environment shapes galaxy evolution: the satellite galaxies' perspective
Astronomy and astrophysics
Friday 16 October 2015
to 11:30 at
Anna Pasquali (Heidelberg University, Germany)
It is by now well established that galaxy evolution is driven by intrinsic and environmental
processes, both contributing to shape the observed properties of galaxies. A number of early
studies, both observational and theoretical, have shown that the star formation activity of galaxies
depends on their environmental local density and also on galaxy hierarchy, i.e. centrals vs. satellites.
Contrary to their central (most massive) galaxy of a group/cluster, satellite galaxies are stripped of
their gas and stars, and have their star formation quenched by their environment. Large galaxy
surveys like SDSS now permit us to investigate in detail environment-driven transformation processes
by comparing centrals and satellites. In this talk I will discuss what we have so far learnt about
environmental effects by analysing the observed properties of local central and satellite galaxies
in SDSS, as a function of their stellar mass and the dark matter mass of their host group/cluster.