Constraining meV Axion Dark Matter with ALMA Observations of the Galactic Center Magnetar SGR 1745-2900
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| Format: | Preprint |
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2025
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| _version_ | 1866918520535646208 |
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| author | De Miguel, Javier Hatziminaoglou, Evanthia Poidevin, Frédéric Rea, Nanda Walker, Daniel L. De Grandis, Davide Prieto-Polo, Jaime |
| author_facet | De Miguel, Javier Hatziminaoglou, Evanthia Poidevin, Frédéric Rea, Nanda Walker, Daniel L. De Grandis, Davide Prieto-Polo, Jaime |
| contents | We report a mm-wave search for axion dark matter from SGR 1745-2900, based on 4.8 h of ALMA observations. No candidate features are found between 133.99-135.78, 135.91-137.70, 145.99-147.78, and 147.99-149.78~GHz, corresponding to 0.55-0.62 meV. Interpreting this null result within a state-of-the-art stellar framework, we derive sensitivity to the axion-photon coupling at the level of $g_γ\gtrsim 2\times10^{-11}$ GeV$^{-1}$ under a standard Navarro-Frenk-White profile; down to $g_γ\gtrsim 2\times10^{-13}$ GeV$^{-1}$ upon accounting for a dense dark-matter spike around Sagittarius A*, probing the quantum chromodynamics axion parameter space. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_06441 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Constraining meV Axion Dark Matter with ALMA Observations of the Galactic Center Magnetar SGR 1745-2900 De Miguel, Javier Hatziminaoglou, Evanthia Poidevin, Frédéric Rea, Nanda Walker, Daniel L. De Grandis, Davide Prieto-Polo, Jaime High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Experiment We report a mm-wave search for axion dark matter from SGR 1745-2900, based on 4.8 h of ALMA observations. No candidate features are found between 133.99-135.78, 135.91-137.70, 145.99-147.78, and 147.99-149.78~GHz, corresponding to 0.55-0.62 meV. Interpreting this null result within a state-of-the-art stellar framework, we derive sensitivity to the axion-photon coupling at the level of $g_γ\gtrsim 2\times10^{-11}$ GeV$^{-1}$ under a standard Navarro-Frenk-White profile; down to $g_γ\gtrsim 2\times10^{-13}$ GeV$^{-1}$ upon accounting for a dense dark-matter spike around Sagittarius A*, probing the quantum chromodynamics axion parameter space. |
| title | Constraining meV Axion Dark Matter with ALMA Observations of the Galactic Center Magnetar SGR 1745-2900 |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2512.06441 |