Schedule by Session

Understanding the nature of dark energy is particularly relevant for future measurements of parameters characterising neutrino physics. In this talk, I will show that time-varying dark energy models exhibit degeneracies with the cosmic neutrino background over extended periods of the cosmic history. I will describe how the combination of multiple probes across cosmic time can help to distinguish between the two components. In particular, I will present current limits on two phenomenological parametrizations of dark energy using this approach (early dark energy and barotropic dark energy). Furthermore, I show that the combination of future CMB and BAO observations will better distinguish the neutrino mass from dark energy and preserve the current sensitivity to the number of neutrino species.