Dark Matter in Gas-Rich Dwarf Galaxies
U. Klein, G. Gentile, P. Salucci, G. J, G. J\'ozsa
TL;DR
This paper examines the dark matter distribution in gas-rich dwarf galaxies, finding that their rotation curves favor cored profiles over the cuspy profiles predicted by standard LCDM simulations.
Contribution
It provides observational evidence that challenges LCDM predictions by showing that dwarf galaxies have cored dark matter profiles instead of cusps.
Findings
Rotation curves favor cored dark matter profiles
Cuspy profiles predicted by LCDM are not observed
Supports alternative dark matter models or modifications
Abstract
We investigate the distribution of dark matter (DM) in gas-rich, low-mass galaxies, confronting them with numerical cosmological simulations with cold dark matter (LCDM). We show that the derived rotation curves comply best with cored DM density profiles, whereas the signatures of the central cusps invariably predicted by LCDM simulations are not seen.
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Taxonomy
TopicsScientific Research and Discoveries · Dark Matter and Cosmic Phenomena · Galaxies: Formation, Evolution, Phenomena