The Vortex State of Ultralight Dark Matter and the Fornax Timing Problem
We investigate the impact of the vortex state of ultralight dark matter (ULDM) on the dynamical friction acting on moving globular clusters. Comparing this force with that for the solitonic ground state, it is shown that the internal structure and rotation of the ULDM core strongly affect the orbital decay of globular clusters. In particular, co-directional rotation in a vortex state can lead to significant suppression of dynamic friction at certain distances where globular clusters and ULDM velocities match. Applying these findings to the Fornax dwarf galaxy, it is found that the Fornax timing problem is naturally alleviated.
Authors
- V. Gorkavenko (ORCID: https://orcid.org/0000-0002-9468-5105)
- Olena Teslyk (ORCID: https://orcid.org/0000-0003-4095-5031)
- É. V. Gorbar (ORCID: https://orcid.org/0000-0002-2684-1276)
- T. V. Gorkavenko (ORCID: https://orcid.org/0000-0001-5818-981X)
- K. Korshynska (ORCID: https://orcid.org/0000-0001-7469-746X)
- Andrii Zaporozhchenko (ORCID: https://orcid.org/0009-0000-1758-2383)
- O. V. Barabash (ORCID: https://orcid.org/0000-0003-0796-4104)
Institutions
- Physikalisch-Technische Bundesanstalt (DE)
- Taras Shevchenko National University of Kyiv (UA)
- Bogolyubov Institute for Theoretical Physics (UA)
- Technische Universität Braunschweig (DE)
Publication Details
- Journal
- Universe
- Published
- 2026-01-30
- DOI
- https://doi.org/10.3390/universe12020039
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00