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Dark matter massive fermions and Einasto profiles in galactic haloes

Abstract

On the basis of a fermionic dark matter model we fit rotation curves of The HI Nearby Galaxy Survey (THINGS) sample and compare our 3-parametric model to other models widely used in the literature: 2-parametric Navarro–Frenk–White, pseudoisothermal sphere, Burkhert models, and 3-parametric Einasto model, suggested as the new “standard dark matter profile” model in the paper by Chemin et al., Astron. J. 142 (2011) 109. The results from the fitting procedure provides evidence for an underlying fermionic nature of the dark matter candidate, with rest mass above the keV regime.

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Correspondence to I. Siutsou.

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The text was submitted by the authors in English.

Paper was presented at the international conference in honor of Ya.B. Zeldovich 100th Anniversary “Subatomic Particles, Nucleons, Atoms, Universe: Processes and Structure” held in Minsk, Belarus, in March 10–14, 2014. Published by the recommendation of the special Editors: S.Ya. Kilin, R. Ruffini, and G.V. Vereshchagin.

Modern numerical simulations can reach better resolution down to particle masses of ~105 M⊙ [3].

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Siutsou, I., Argüelles, C.R. & Ruffini, R. Dark matter massive fermions and Einasto profiles in galactic haloes. Astron. Rep. 59, 656–666 (2015). https://doi.org/10.1134/S1063772915070124

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  • DOI: https://doi.org/10.1134/S1063772915070124

Keywords

  • Dark Matter
  • Bayesian Information Criterion
  • Astronomy Report
  • Dark Matter Candidate
  • Galactic Halo