Dynamical friction in ultralight dark matter: Plummer sphere perspective
Abstract In models of dark matter composed of feebly interacting ultralight bosons in the state of Bose–Einstein condensate, the dynamical friction force acting on circularly moving globular clusters modelled as Plummer spheres is determined. Analytic expressions for both radial and tangential components of the dynamical friction force are given. We reveal that the dynamical friction force for the Plummer sphere deviates from that for a point probe of the same mass for significantly large ratio of the Plummer sphere radius to its orbital radius as well as for large values of the Mach number.
Authors
- V. Gorkavenko (ORCID: https://orcid.org/0000-0002-9468-5105)
- É. V. Gorbar (ORCID: https://orcid.org/0000-0002-2684-1276)
- Andrii Zaporozhchenko (ORCID: https://orcid.org/0009-0000-1758-2383)
- Oleksandr Yakymenko (ORCID: https://orcid.org/0000-0002-1841-1145)
Institutions
- University of Padua (IT)
- Taras Shevchenko National University of Kyiv (UA)
- Istituto Nazionale di Fisica Nucleare, Galileo Galilei Institute for Theoretical Physics (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT)
- Bogolyubov Institute for Theoretical Physics (UA)
Publication Details
- Journal
- Physica Scripta
- Published
- 2025-07-01
- DOI
- https://doi.org/10.1088/1402-4896/adebb7
- Citations
- 2
- Primary Topic
- Advanced Thermodynamics and Statistical Mechanics
- Type
- article
- Field-Weighted Citation Impact
- 2.65