Neutrino Lumps in Quintessence Cosmology

TL;DR

This paper explores static, spherically symmetric neutrino structures in quintessence cosmology, revealing potential astrophysical objects formed from neutrino perturbations influenced by dark energy interactions.

Contribution

It presents the first static solutions of Einstein equations for neutrino lumps in models with growing neutrino mass and quintessence, linking them to cosmological perturbation growth.

Findings

Neutrino lumps can form stable, static configurations.

Their properties depend on the present neutrino mass.

These objects may result from cosmological perturbation evolution.

Abstract

Neutrinos interacting with the quintessence field can trigger the accelerated expansion of the Universe. In such models with a growing neutrino mass the homogeneous cosmological solution is often unstable to perturbations. We present static, spherically symmetric solutions of the Einstein equations in the same models. They describe astophysical objects composed of neutrinos, held together by gravity and the attractive force mediated by the quintessence field. We discuss their characteristics as a function of the present neutrino mass. We suggest that these objects are the likely outcome of the growth of cosmological perturbations.