Princeton University Gravity Group Astrophysics/Cosmology Special Seminar

I will describe the possibility that dark energy might interact with other species in the universe (cdm, neutrinos or within scalar-tensor theories). I will illustrate the impact of the coupling on observations, both at the linear and non-linear level. In particular, I will focus on growing neutrino quintessence, in which neutrinos can cluster at large scales, under the effect of a fifth force mediated by the dark energy scalar field.