%0 Generic
%A Weber, Maik
%D 2012
%F heidok:14300
%R 10.11588/heidok.00014300
%T Structure Formation in Growing Neutrino Cosmology
%U https://archiv.ub.uni-heidelberg.de/volltextserver/14300/
%X The mystery of dark energy may be related to the physics of neutrino mass. It has  been proposed that a growing neutrino mass triggers the onset of the accelerated  expansion of the Universe by stopping the evolution of a dynamical dark energy  scalar field. In these scenarios, the scalar field mediates a strong attractive force  between neutrinos, which considerably complicates the treatment of perturbations;  standard methods such as linear perturbation theory and Newtonian N–body simulations  are not appropriate. In this work, we present a simulation method that  allows to incorporate nonlinear neutrino clustering, relativistic velocities, spatial  neutrino mass variations, and backreaction effects in growing neutrino cosmologies.  For an exemplary parameter set, we study the cosmological evolution until redshift  z = 1 and identify characteristic signatures of the model. In particular, the formation  and properties of nonlinear neutrino structures are investigated. In a more  general context, we ask for promising methods to constrain models with enhanced  structure formation on large scales and attend to 3D weak lensing. Without adopting  a specific model, we present adequate numerical tools for the computation of  3D weak lensing spectra. As an application, we consider a simple parameterization  of clustering dark energy and forecast constraints on the properties of dark energy  by future data.