Chemical Evolution of Galaxies in their Cosmological Context




PhD achievements

Realisation of a full simulation of the MareNostrum volume.
(with a resolution of ~ 8x107 M/h per baryonic particle, using 2x2563 particles in a 50 Mpc/h box)

Amongst others, the following mecanisms have been introduced into the simulation:
  • Star formation process calibrated on a cosmic scale,
  • Supernovae feedback from both type II and Ia (taking into account the appropriate delay time),
  • Turbulent metallic diffusion (transport of heavy elements along the gradients of concentration),
  • AGN activity, modeled by a accretion disk arround BH and a conic jet kinetic feedback.

The main results that have been obtained are :
  • a well defined Colour-Magnitude Diagram,
  • distributions of stellar populations ages against galaxy mass in agreement with observations,
  • distributions of stellar metallicity against galaxy mass in agreement with observations,
  • the slope of the [α / Fe] relation reproducing extremely well the observations,
  • strongly constrained scaling relations, such as the Faber-Jackson & Tully-Fisher relations,
  • the evolution of the Black-Holes cosmic density following smoothly the observations,
  • the reproduction of the BH scaling relations, such as MBH vs σ*.
Evolution of the density, temperature & metallicity of the medium in a slice of the volume
(click on this animation to see the full set of properties in detail)