Backreaction in Growing Neutrino Quintessence

Understand

We investigate the cosmological effects of neutrino lumps in Growing Neutrino Quintessence.

• The strongly non-linear effects are resolved by means of numerical N-body simulations which include relativistic particles, non-linear scalar field equations and backreaction effects.
• For the investigated models with a constant coupling between the scalar field and the neutrinos the backreaction effects are so strong that a realistic cosmology is hard to realize.
• This points towards the necessity of a field dependent coupling in Growing Neutrino Quintessence.