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 surrounding a non-rotating black hole in a quasi-stationary approximation. We resolve the region near the horizon as well as the far field region. Our results are relevant in a wide range of masses, from ultralight to MeV scalar fields and for black holes ranging from primordial to supermassive. For instance, a system with a scalar field consistent with ultralight dark matter and a black hole 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 [P. Gondolo and Silk, Phys. Rev. Lett., 83:1719-1722, 1999] for cold dark matter.

11 pages, 2 figures. Final version as published in CQG

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Cited by in corpus (3)

• Gravitational waves of quasi-circular, inspiraling black hole binaries in an ultralight vector dark-matter environment
• Noble gravitational atoms: Self-gravitating black hole scalar wigs with angular momentum number
• $\ell$-Boson stars in anti-de Sitter spacetime