Testing the tensor-vector-scalar Theory with the latest cosmological observations

TL;DR

This paper evaluates the tensor-vector-scalar (TeVeS) gravity model against recent cosmological observations, including galaxy velocity spectra and CMB data, finding it incompatible with current measurements when combined with sterile neutrinos.

Contribution

It provides new constraints on the TeVeS model using recent observational data, including galaxy surveys, Sunyaev-Zel'dovich effects, and Planck CMB measurements, especially testing its viability with sterile neutrinos.

Findings

TeVeS is incompatible with Planck CMB data when combined with sterile neutrinos.

Recent galaxy velocity and Sunyaev-Zel'dovich measurements further constrain TeVeS.

The model is ruled out by current cosmological observations.

Abstract

The tensor-vector-scalar (TeVeS) model is considered a viable theory of gravity. It produces the Milgrom's modified Newtonian dynamics in the nonrelativistic weak field limit and is free from ghosts. This model has been tested against various cosmological observations. Here we investigate whether new observations such as the galaxy velocity power spectrum measured by 6dF and the kinetic Sunyaev Zel'dovich effect power spectrum measured by ACT/SPT can put further constraints on the TeVeS model. Furthermore, we perform the test of TeVeS cosmology with a sterile neutrino by confronting to Planck data, and find that it is ruled out by cosmic microwave background measurements from the Planck mission.