prof. Stefano Borgani

Univerza v Trstu in INAF – Tržaški astronomski observatorij

v ponedeljek, 13. aprila 2015, ob 13. uri v predavalnici F4 (Jadranska 19, Ljubljana)

I will first briefly review the application of galaxy clusters as tools to trace cosmic evolution and to constrain cosmological models. I will then discuss the recent advances in the this field, as driven by the increasing quality of observational data, and by the much improved description of clusters through detailed numerical simulations.

After discussing successes and criticalities of these simulations, I will present results from their analysis, aimed at calibrating clusters as precision tools for cosmology. In this context, I will discuss (a) possible biases that affect mass estimates based on X-ray and weak lensing data; (b) effects of baryons on the calibration of the halo mass function; (c) robustness of the baryons mass fraction for cosmological tests. I will finally discuss the perspectives for precision cosmology with galaxy clusters offered by the future generation of large multi-wavelegth surveys.