Black hole accretion discs and screened scalar hair

Abstract

We present a novel way to investigate scalar field profiles around black holes with an accretion disc for a range of models where the Compton wavelength of the scalar is large compared to other length scales. By analysing the problem in "Weyl" coordinates, we are able to calculate the scalar profiles for accretion discs in the static Schwarzschild, as well as rotating Kerr, black holes. We comment on observational effects.

19 pages, 5 figures

References in corpus (11)

• Instability of the massive Klein-Gordon field on the Kerr spacetime
• Superradiant instabilities in astrophysical systems
• Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results
• Detecting Chameleons through Casimir Force Measurements
• Probing Dark Energy with Atom Interferometry
• Iron K$\alpha$ line of Kerr black holes with scalar hair
• Detecting Chameleons: The Astronomical Polarization Produced by Chameleon-like Scalar Fields
• Atomic Precision Tests and Light Scalar Couplings
• The Effect of a Chameleon Scalar Field on the Cosmic Microwave Background
• Anomalous coupling of scalars to gauge fields
• Lectures on Screened Modified Gravity

Cited by in corpus (8)

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• Unscreening scalarons with a black hole
• Testing Gravity with Black Hole X-Ray Data
• X-Ray Tests of General Relativity with Black Holes
• An interstellar mission to test astrophysical black holes
• Dynamical de Sitter black holes in a quasi-stationary expansion
• Search for Variations of Fundamental Constants
• Hairy Waves: Gravitational Waves in the presence of Screening Mechanism