Analytic Calculation of Dynamical Friction for Plummer Sphere in Ultralight Dark Matter

Authors

  • O.V. Barabash Faculty of Physics, Taras Shevchenko National University of Kyiv
  • T.V. Gorkavenko Faculty of Physics, Taras Shevchenko National University of Kyiv
  • V.M. Gorkavenko Faculty of Physics, Taras Shevchenko National University of Kyiv
  • O.M. Teslyk Faculty of Physics, Taras Shevchenko National University of Kyiv
  • N.S. Yakovenko Faculty of Physics, Taras Shevchenko National University of Kyiv
  • A.O. Zaporozhchenko Faculty of Physics, Taras Shevchenko National University of Kyiv
  • E.V. Gorbar Faculty of Physics, Taras Shevchenko National University of Kyiv, Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe70.11.759

Keywords:

ultralight bosonic dark matter, Plummer sphere, dynamical friction force, globular clusters, dwarf galaxies

Abstract

The dynamical friction force acting on a spatially extended probe (globular clusters and dwarf galaxies) moving in the environment of ultralight bosonic dark matter in the state of the Bose–Einstein condensate is determined. Modelling the probe as a r sphere of radius lp, the radial and tangential components of the dynamic friction force are found in an analytic form, which reduces in the limit lp → 0 to the corresponding analytic expressions obtained in the literature in the case of a point probe. The dependence of dynamical friction force on boson particle mass was analyzed and found to be non-monotonous in the interval 10−23÷10−21 eV.

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Published

2025-11-26

Issue

Vol. 70 No. 11 (2025)

Section

Fields and elementary particles

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How to Cite

Analytic Calculation of Dynamical Friction for Plummer Sphere in Ultralight Dark Matter. (2025). Ukrainian Journal of Physics, 70(11), 759. https://doi.org/10.15407/ujpe70.11.759

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