The need for dark matter in galaxies

TL;DR

This paper critically examines a proposed alternative to dark matter in explaining galactic rotation curves and argues that such models are fundamentally flawed and cannot succeed.

Contribution

The paper provides a critical analysis showing that models claiming to explain galactic rotation without dark matter are inherently unviable.

Findings

Proposed models cannot account for observed rotation curves.

Dark matter remains necessary for explaining galactic dynamics.

Alternative models are fundamentally flawed.

Abstract

Cooperstock and Tieu have proposed a model to account for galactic rotation curves without invoking dark matter. I argue that no model of this type can work.