New evidence for dark matter

TL;DR

This paper introduces a universal relation in matter distributions across all observed scales, aligning closely with dark matter simulations, and offers a new method to test dark matter properties through observations.

Contribution

It extends previous analyses to a broader mass range, identifies a different scaling law, and demonstrates the relation's insensitivity to baryonic feedback, aiding dark matter research.

Findings

Universal matter distribution relation matches dark matter simulations

Relation observed across all cosmic structures from dwarf galaxies to clusters

Provides a new observational tool to constrain dark matter properties

Abstract

We present a new universal relation, satisfied by matter distributions at all observed scales, and show its amazingly good and detailed agreement with the predictions of the most up-to-date pure dark matter simulations of structure formation in the Universe. This work extends the previous analysis [0904.4054; 0909.5203] to a larger range of masses, demonstrates a different scaling law, and compares it with numerical simulations. This behaviour seems to be insensitive to the complicated feedback of baryons on dark matter. Therefore, it potentially allows to compare theoretical predictions directly with observations, thus providing a new tool to constrain the properties of dark matter. Such a universal property, observed in structures of all sizes (from dwarf spheroidal galaxies to galaxy clusters), is difficult to explain without dark matter, thus providing new evidence for its existence.