Clustering in growing neutrino cosmologies

TL;DR

Growing neutrino cosmologies predict significant neutrino clustering at supercluster scales, potentially revealing a new force mediated by dark energy scalar fields, with observable large-scale structures forming around redshift 1.

Contribution

This paper demonstrates that growing neutrino models can produce large-scale neutrino clustering and suggests observable signatures of a new force beyond gravity.

Findings

Neutrino lumps form at redshift ~1

Neutrino clustering influences dark matter distribution

Large-scale structures could indicate a new scalar-mediated force

Abstract

We show that growing neutrino models, in which the growing neutrino mass stops the dynamical evolution of a dark energy scalar field, lead to a substantial neutrino clustering on the scales of superclusters. Nonlinear neutrino lumps form at redshift z ~ 1 and could partially drag the clustering of dark matter. If observed, large scale non-linear structures could be an indication for a new attractive force stronger than gravity and mediated by the 'cosmon' dark energy scalar field.