Rotation of galaxies and dark matter

TL;DR

This paper introduces a new gravitational metric for rotating galaxies, demonstrating that galaxy rotation can mimic dark matter effects, challenging the applicability of traditional metrics like Kerr for large angular momentum systems.

Contribution

The paper proposes a novel metric for rotating galactic disks that accounts for high angular momentum, providing a new perspective on galaxy rotation and dark matter.

Findings

The new metric is applicable to galaxies with large angular momentum.

Galaxy rotation effects can imitate dark matter.

Kerr metric is inadequate for the Milky Way's rotation.

Abstract

In a previous paper by the author was proposed a new metric for the gravitational field of a thin rotating disk physically different from the Kerr metric. The metric is admissible for any angular momentum of the disk. As demonstrated in the present paper the parameter determining the angular momentum of the Milky Way greatly exceeds its gravitational radius so that the Kerr metric physically admissible only if the angular momentum is sufficiently small is completely inapplicable to the Milky Way. It is shown on the basis of the new metric that the rotation of the Milky Way plays a decisive role in the motion of satellites in its gravitational field. The effects due to the rotation can imitate the presence of hypothetical dark matter.