2019/09/05 by Philippe Brax, Jose A. R. Cembranos, Patrick Valageas +1 · 45 citations
Physics and Astronomy · #Accretion (finance) #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galactic Center #Galaxy #Halo #Intermediate-mass black hole #Mathematical physics #Physics #Quantum Electrodynamics and Casimir Effect #Quantum electrodynamics #Scalar field #Scalar field dark matter #Schwarzschild radius #Supermassive black hole #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.101.023521
published in Physical review. D/Physical review. D. 101(2) (American Physical Society) · 16 pages
arxiv created 2019/09/05 · openalex publication_date 2020/01/24 · arxiv updated 2020/01/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.