Dark matter in low mass surface density galaxies

TL;DR

This paper analyzes the dark matter distribution in low surface density galaxies, using high-resolution velocity data to better understand their mass profiles and the role of dark matter.

Contribution

It provides the largest high-resolution velocity dataset for LSB and dwarf galaxies, offering new insights into their dark matter halos.

Findings

Dark matter dominates these galaxies at all radii.

High-resolution velocity fields reveal detailed mass distributions.

Results challenge or refine existing dark matter models.

Abstract

Low mass surface density spiral and irregular galaxies like low surface brightness (LSB) and dwarf galaxies are unique laboratories to study the dynamical properties of Dark Matter halos because their mass is generally dominated by dark matter at all galactocentric radii. We present results from the largest sample ever assembled of high resolution Halpha velocity fields of LSB and dwarf galaxies in order to study their mass distributions.