Analytic calculation of dynamical friction for Plummer sphere in ultralight dark matter
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arXiv
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| Format: | Preprint |
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2025
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| author | Barabash, O. V. Gorkavenko, T. V. Gorkavenko, V. M. Teslyk, O. M. Yakovenko, N. S. Zaporozhchenko, A. O. Gorbar, E. V. |
| author_facet | Barabash, O. V. Gorkavenko, T. V. Gorkavenko, V. M. Teslyk, O. M. Yakovenko, N. S. Zaporozhchenko, A. O. Gorbar, E. V. |
| contents | 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. Modeling the probe as a Plumer sphere of radius $l_p$, the radial and tangential components of the dynamic friction force are found in an analytic form, which reduce in the limit $l_p \to 0$ to the corresponding analytic expressions obtained in the literature in the case of a point probe. The dependence of the dynamical friction force on boson particle mass $m$ was analyzed and found to be non-monotonous in the interval $10^{-23} - 10^{-21}$eV. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_06448 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Analytic calculation of dynamical friction for Plummer sphere in ultralight dark matter Barabash, O. V. Gorkavenko, T. V. Gorkavenko, V. M. Teslyk, O. M. Yakovenko, N. S. Zaporozhchenko, A. O. Gorbar, E. V. Astrophysics of Galaxies 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. Modeling the probe as a Plumer sphere of radius $l_p$, the radial and tangential components of the dynamic friction force are found in an analytic form, which reduce in the limit $l_p \to 0$ to the corresponding analytic expressions obtained in the literature in the case of a point probe. The dependence of the dynamical friction force on boson particle mass $m$ was analyzed and found to be non-monotonous in the interval $10^{-23} - 10^{-21}$eV. |
| title | Analytic calculation of dynamical friction for Plummer sphere in ultralight dark matter |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2504.06448 |