Galactic phase transition at Ec=0.11 eV from rotation curves of cored LSB galaxies and nonperturbative dark matter mass

TL;DR

This study analyzes rotation curves of Low Surface Brightness galaxies to identify a phase transition energy in dark matter, supporting cored profiles over cuspy ones and suggesting a link to neutrino mass scale.

Contribution

It determines a phase transition energy scale in dark matter models using galaxy rotation data, providing evidence for nonperturbative effects in dark matter structure.

Findings

Core radius of galaxies is approximately 260 parsecs.

Phase transition energy E_c is about 0.11 eV.

Results support cored dark matter profiles over cuspy NFW profiles.

Abstract

We analyze the a set of seventeen rotation curves of Low Surface Brightness (LSB) galaxies from the The HI Nearby Galaxy Survey (THINGS) with different mass models to study the core structure and to determine a phase transition energy scale (E_c) between hot and cold dark matter, due to nonperturbative effects in the Bound Dark Matter (BDM) model. Our results agree with previous ones implying the cored profiles are preferred over the N-body motivated cuspy NFW profile. We find an average galactic core radius of r_c = 260 \times 10^{+/- 1.3} pc and a phase transition energy E_c = 0.11\times 10^{+/- 0.46} eV, that is of the same order of magnitude as the sum of the neutrino masses.