Gravitational atoms beyond the test field limit: the case of Sgr A* and ultralight dark matter
Abstract We construct gravitational atoms including self-gravity, obtaining solutions of the Einstein–Klein–Gordon equations for a scalar field (SF) surrounding a non-rotating black hole (BH) in a quasi-stationary approximation. We resolve the region near the horizon as well as the far field one. Our results are relevant in a wide range of masses, from ultralight to MeV SFs and for BHs ranging from primordial to supermassive. For instance, the core of a galactic halo consistent with ultralight dark matter and a BH with a mass comparable to that of Sagittarius A* can be modeled. A density spike near the event horizon, although present, is negligible, contrasting with the prediction in Gondolo and Silk (1999 Phys. Rev. Lett. 83 1719–22) for cold dark matter.
Authors
- Darío Núñez (ORCID: https://orcid.org/0000-0003-0295-0053)
- Miguel Megevand (ORCID: https://orcid.org/0000-0003-0224-9611)
- Juan Carlos Degollado (ORCID: https://orcid.org/0000-0002-8603-5209)
- Miguel Alcubierre (ORCID: https://orcid.org/0000-0003-3367-9868)
- Olivier Sarbach (ORCID: https://orcid.org/0000-0002-0753-4449)
- Alberto Díez-Tejedor (ORCID: https://orcid.org/0000-0001-9322-3083)
- Juan Barranco (ORCID: https://orcid.org/0000-0002-9511-6772)
- Argelia Bernal (ORCID: https://orcid.org/0000-0003-3133-5957)
Institutions
- Universidad de Guanajuato (MX)
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- Universidad Michoacana de San Nicolás de Hidalgo (MX)
- Universidad de León (MX)
- University of Aveiro (PT)
- Universidad Nacional Autónoma de México (MX)
Publication Details
- Journal
- Classical and Quantum Gravity
- Published
- 2025-10-08
- DOI
- https://doi.org/10.1088/1361-6382/ae110a
- Citations
- 4
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 4.62