Bruno Henriques (MPA)

Galaxy formation in the Planck Cosmology - Matching the observed evolution of star-formation rates, colours and stellar masses
Wann Am 03.02.2015 von 15:00 bis 16:00
  • Special Seminar
  • Kolloquium
Wo SH, Hörsaal
Termin übernehmen vCal / iCal

I will present results from the recent major release of the Munich galaxy formation model. In addition to the new PLANCK cosmology, significant modifications to the physics were implemented in order to fix major problems identified in previous versions. These include the too early formation of low mass objects and their too passive populations at later times. I will show how the new physics result in a model that is consistent with the observed evolution of the stellar mass functions of all, red and blue galaxies from z=3 to z=0, while matching the evolution of the star formation rate densities and the main sequence of star formation across the entire observable mass range. I will connect the different evolution of low and high mass galaxies to the efficiency of the star formation quenching processes included in the model such as AGN radio mode feedback and environmental effects across cosmic time. I will then detail the plans we have to extend the predictive capabilities of this model to the key areas required to interpret new observational surveys that promise to revolutionize our knowledge of galaxy formation. These include resolved studies of molecular gas from sub-millimetre telescopes, and ionised gas and stellar populations from high-resolution multi-object spectrographs. To provide theoretical insights to these observations, models have to resolve the internal distribution of stars and gas while following different hydrogen phases and heavy elements.