Fuzzy dark matter fails to explain the dark matter cores
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909497649266688 |
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| author | Benito, María Hütsi, Gert Müürsepp, Kristjan Sánchez~Almeida, Jorge Urrutia, Juan Vaskonen, Ville Veermäe, Hardi |
| author_facet | Benito, María Hütsi, Gert Müürsepp, Kristjan Sánchez~Almeida, Jorge Urrutia, Juan Vaskonen, Ville Veermäe, Hardi |
| contents | 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 $m_a = 3.2_{-0.6}^{+0.8}\times 10^{-21}\,{\rm eV}$ is also in conflict with existing Lyman-$α$ bounds. Our results suggest that FDM cannot provide a consistent explanation for DM cores and imply $m_a > 2.2\times 10^{-21}\,{\rm eV}$ at to $2σ$ CL. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_12030 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fuzzy dark matter fails to explain the dark matter cores Benito, María Hütsi, Gert Müürsepp, Kristjan Sánchez~Almeida, Jorge Urrutia, Juan Vaskonen, Ville Veermäe, Hardi Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology 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 $m_a = 3.2_{-0.6}^{+0.8}\times 10^{-21}\,{\rm eV}$ is also in conflict with existing Lyman-$α$ bounds. Our results suggest that FDM cannot provide a consistent explanation for DM cores and imply $m_a > 2.2\times 10^{-21}\,{\rm eV}$ at to $2σ$ CL. |
| title | Fuzzy dark matter fails to explain the dark matter cores |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.12030 |