The Dark Matter Puzzle And Other Issues

TL;DR

This paper explores various theories explaining galactic rotation curve flattening, including altered space dimensionality, variable gravitational constant, and MOND, and discusses the universe as a black hole.

Contribution

It compares three different approaches to dark matter phenomena and introduces the idea of the universe as a black hole as a paradigm.

Findings

Different theories can explain galactic rotation curves

The universe may be a black hole

Modified gravity approaches are viable

Abstract

We consider the problem of the flattening of the velocity curves in galactic discs and the consequent postulation of dark matter from three different but converging perspectives-- a change in the large scale dimensionality of space, a variation of $G$ and the MOND approach. We also discuss the paradigm of the universe itself being a Black Hole.