Shortly after
their birth galaxies go through a growth spurt
doubling their mass on average every 150
million years. Understanding the impact of
this phase on the physical properties of galaxies and their
environment is one of the questions we are
investigating in my group.
Dark matter haloes hosting galaxies
are strongly affected by the in- and out-flow
of gas. In series of
numerical simulations
we
show that during the cosmic evolution of
galaxies inflow phases of gas go along with
star burst and an increase in the amount of
dark matter in the inner parts of dark matter
haloes. Subsequent outflows of gas driven by
exploding supernovae on the contrary lower the
amount of dark matter in the centres.