Solving the small-scale cosmology problems with the APOSTLE suite of simulations (Matthieu Schaller; Durham University)

Desde Octubre 19, 2017 13:15 hasta Octubre 19, 2017 13:45

En Instituto de Astrofísica, Pontificia Universidad Católica, Vicuña Mackenna 4860, Santiago, Chile

Categorías: Seminarios

The LCDM model has been very successful at reproducing the observed large scale structure of the Universe and furture big surveys are aimed at measuring tiny deviations from an otherwise simple model. However, on the smaller scales, the model has faced some challenges, especially when comparing model predictions to the observed satellite population of the Milky Way. In this talk, I'll introduce the APOSTLE suite of cosmological hydrodynamical simulations that zoom in onto the local group. I'll discuss how the 'missing satellite', 'too-big-to-fail' and 'planes of satellites' problems can be alleviated by the use of reasonable baryon physics and appropriate modelling of instrumentl pipelines. I'll demonstrate that there is no small scale crisis for the LCDM model and present some avenues for the future.