Journal
PHYSICAL REVIEW D
Volume 101, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.101.023521
Keywords
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Funding
- EU Horizon 2020 research and innovation program under the Marie-Sklodowska Grant [690575]
- COST (European Cooperation in Science and Technology) [CA15117]
- MINECO (Spain) [FIS2016-78859-P]
- P2I research department
- SPU research department
- P2IO Laboratory of Excellence (program Investissements davenir) [ANR-11-IDEX-0003-01, ANR-10-LABX-0038]
- IPhT
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In scalar-field dark matter scenarios, a scalar-field soliton could form at the center of galactic halos, around the supermassive black holes that sit at the center of galaxies. Focusing on the large scalar-mass limit, where the soliton is formed by the balance between self-gravity and a repulsive self-interaction, we study the infall of the scalar field onto the central Schwarzschild black hole. We derive the scalar-field profile, from the Schwarzschild radius to the large radii dominated by the scalar cloud. We show that the steady state solution selects the maximum allowed flux, with a critical profile that is similar to the transonic solution obtained for the hydrodynamic case. This finite flux, which scales as the inverse of the self-interaction coupling, is small enough to allow the dark matter soliton to survive for many Hubble times.
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