2010/09/30 by Eugeny Babichev, E. Babichev · 42 citations
Mathematics · Physics and Astronomy · #Accretion (finance) #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Black Holes and Theoretical Physics #Black hole (networking) #Boundary (topology) #Boundary value problem #Classical mechanics #Cosmology and Gravitation Theories #Flow (mathematics) #General relativity #Horizon #Infinity #Mathematical analysis #Mathematics #Mechanics #Physics #Quantum mechanics #Range (aeronautics) #Schwarzschild metric #Schwarzschild radius #Theoretical physics #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.83.024008
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 83(2) (American Physical Society) · 14 pages, 3 figures; v.3: matches published version
openalex publication_date 2011/01/07 · arxiv created 2011/01/26 · arxiv updated 2011/02/25 · openalex created_date 2020/07/02 · openalex updated_date 2026/08/05
We study steady-state spherically symmetric accretion of a Galileon field onto a Schwarzschild black hole in the test-fluid approximation. The Galileon is assumed to undergo a stage of cosmological evolution, thus setting a nontrivial boundary condition at spatial infinity. The critical flow is found for some parameters of the theory. There is a range of parameters when the critical flow exists, but the solution is unstable. It is also shown that for a certain range of parameters the critical flow solution does not exist. Depending on the model the sound horizon of the flow can be either outside or inside of the Schwarzschild horizon. The latter property may make it problematic to embed the Galileon theory in the standard black hole thermodynamics.