Spheroidal and elliptical galaxy radial velocity dispersion determined from Cosmological General Relativity

TL;DR

This paper derives galaxy radial velocity dispersions using Cosmological General Relativity, suggesting less dark matter is needed and showing velocity dispersion remains roughly constant outward from the center.

Contribution

It introduces a Carmelian theory-based method to calculate galaxy velocity dispersions, challenging dark matter assumptions in galactic dynamics.

Findings

Dynamical mass estimates are 10-100 times lower than Newtonian calculations.

Velocity dispersion remains nearly constant beyond the galaxy's core.

No halo dark matter is required according to the model.

Abstract

Radial velocity dispersion in spheroidal and elliptical galaxies, as a function of radial distance from the center of the galaxy, has been derived from Cosmological Special Relativity. For velocity dispersions in the outer regions of spherical galaxies, the dynamical mass calculated for a galaxy using Carmelian theory may be 10 to 100 times less than that calculated from standard Newtonian physics. This means there is no need to include halo dark matter. The velocity dispersion is found to be approximately constant across the galaxy after falling from an initial high value at the center.