Fuzzy dark matter fails to explain dark matter cores

Bibcode
2025PDU....4902010B
DOI
10.1016/j.dark.2025.102010
Benito, María; Hütsi, Gert; Müürsepp, Kristjan; Sánchez Almeida, Jorge; Urrutia, Juan; Vaskonen, Ville; Veermäe, Hardi
Bibliographical reference

Physics of the Dark Universe

Advertised on:
9
2025
Number of authors
7
IAC number of authors
1
Citations
5
Refereed citations
0
Description
Ultrafaint dwarf galaxies (UFDs) are ideal for studying dark matter (DM) due to minimal baryonic effects. UFD observations suggest cored DM profiles. We find that the core radius–stellar mass scaling predicted by fuzzy dark matter (FDM) is at 6.1σ tension with UFD observations. Combining observations from 27 UFDs, the required FDM mass ma=3.2‑0.6+0.8×10‑21eV is also in conflict with existing Lyman-α bounds. Our results suggest that FDM cannot provide a consistent explanation for DM cores and imply ma>2.2×10‑21eV at to 2σ CL.
Type
Refereed
Dark matter

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