Testing universal dark-matter caustic rings with galactic rotation curves

TL;DR

This study tests the hypothesis that universal dark-matter caustic rings influence galactic rotation curves, using an improved statistical analysis on a large dataset, and finds no supporting evidence for their universality.

Contribution

It provides a rigorous, large-scale statistical test that challenges previous claims of universal dark-matter caustic rings in galaxies.

Findings

No evidence for universal caustic rings in galactic rotation curves

Improved statistical methods enhance analysis robustness

Results contradict earlier suggestions of universal dark-matter features

Abstract

Infall of cold dark matter on a galaxy may result in caustic rings where the particle density is enhanced. They may be searched for as features in the galactic rotation curves. Previous studies suggested the evidence for these caustic rings with universal, that is common for different galaxies, parameters. Here we test this hypothesis with a large independent set of rotation curves by means of an improved statistical method. No evidence for universal caustic rings is found in the new analysis.