Galaxy Rotation Curves in the µ-Deformation Based Approach to Dark Matter

  • A. M. Gavrilik Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
  • I. I. Kachurik Khmel’nyts’kyi National University
  • M. V. Khelashvili Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
Keywords: dark matter, м-deformation, deformed Lane–Emden equation, galaxy rotation curves

Abstract

We elaborate further the м-deformation-based approach to the modeling of dark matter, in addition to the earlier proposed use of м-deformed thermodynamics. Herein, we construct м-deformed analogs of the Lane–Emden equation (for density profiles) and find their solutions. Using these, we plot the rotation curves for a number of galaxies. Different curves describing the chosen galaxies are labeled by respective (different) values of the deformation parameter м. As a result, the use of м-deformation leads to the improved agreement with observational data. For all the considered galaxies, the obtained rotation curves (labeled by м) agree better with data, as compared to the well-known Bose–Einstein condensate model results of T. Harko. Besides, for five of the eight cases of galaxies, we find a better picture for rotation curves, than the corresponding Navarro–Frenk–White (NFW) curves. The possible physical meaning of the parameter м basic for this version of м-deformation is briefly discussed.

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Published
2019-11-25
How to Cite
Gavrilik, A., Kachurik, I., & Khelashvili, M. (2019). Galaxy Rotation Curves in the µ-Deformation Based Approach to Dark Matter. Ukrainian Journal of Physics, 64(11), 1042. https://doi.org/10.15407/ujpe64.11.1042
Section
Fields and elementary particles