Analyzing planar galactic halo distributions with fuzzy/cold dark matter models

Sangnam Park, Dongsu Bak, Jae Weon Lee, Inkyu Park

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We perform a numerical comparison between the fuzzy dark matter model and the cold dark matter model, focusing on formation of satellite galaxy planes around massive galaxies. Such galactic dynamics with controlled initial subhalo configurations are investigated using GADGET2 for the cold dark matter and PyUltraLight for the fuzzy dark matter, respectively. We demonstrate that satellite galaxies in the fuzzy dark matter side have a tendency to form more flattened and corotating satellite systems than in the cold dark matter side mainly due to the dissipation by the gravitational cooling effect of the fuzzy dark matter. Our simulations with the fuzzy dark matter typically show the minor-to-major axis ratio c/a of the satellite galaxy planes to be 0.21 ∼ 0.30; this well matches the current observed value for the Milky Way.

Original languageEnglish
Article number033
JournalJournal of Cosmology and Astroparticle Physics
Volume2022
Issue number12
DOIs
StatePublished - 1 Dec 2022

Keywords

  • dark matter simulations
  • dark matter theory
  • galaxy formation

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