13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

Neutrinos beyond the linear regime: a new theoretical approach

15 Dec 2015, 18:20
20m
Level -1, Room 16 (International Conference Centre Geneva)

Level -1, Room 16

International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva

Speaker

Hélène DUPUY

Description

There is now no doubt that neutrinos are massive particles fully involved in the nonlinear growth of the large-scale structure of the universe. A problem is that their nonlinear behavior is particularly difficult to describe by theoretical models. In my talk, I will present a new method allowing to deal with massive neutrinos beyond the linear regime. The key idea is to describe neutrinos as a collection of flows instead of considering them as a single multi-flow fluid. In this framework, no velocity dispersion has to be taken into account and the time evolution of neutrinos can be encoded in fluid equations similar to the ones describing cold dark matter. Hopefully, this approach is a further step towards a computation of the nonlinear matter power spectrum in the presence of massive neutrinos.

Primary author

Co-author

Dr Francis Bernardeau (Institut d'astrophysique de Paris)

Presentation Materials