Bigravity : A bimetric model of the Universe. Positive and negative gravitational lensings

TL;DR

This paper introduces a bimetric universe model that predicts both positive and negative gravitational lensing, offering an alternative explanation for the faintness of high redshift galaxies.

Contribution

It presents an exact nonlinear solution in a bimetric framework demonstrating negative gravitational lensing, expanding the understanding of gravitational effects in cosmology.

Findings

Existence of negative gravitational lensing in the model

Negative lensing can explain faint high redshift galaxies

Provides an alternative to dwarf galaxy interpretation

Abstract

After a short summary of our bimetric model of the Universe, an exact nonlinear solution is built, which demonstrates the existence of solutions for our two coupled field equations system. In addition to the classical positive gravitational lensing, this solution is shown to also lead to negative gravitational lensing, a phenomenon previously described in 1995 (Astrophysics and Space Science). Such negative lensing provides an alternative interpretation for the observed faint magnitudes of high redshift galaxies, so far considered as dwarf galaxies.