Black hole superradiance and polarization-dependent bending of light
arXiv:1711.08298 · doi:10.1088/1475-7516/2018/04/059
Abstract
An inhomogeneous pseudo-scalar field configuration behaves like an optically active medium. Consequently, if a light ray passes through an axion cloud surrounding a Kerr black hole, it may experience a polarization-dependent bending. We explore the size and relevance of such effect considering both the QCD axion and a generic axion-like particle.
Bulk of 29 pages + 11 figures. v2: minor changes, version accepted for publication in JCAP
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- Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies
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- Detecting Axion-like Dark Matter with Linearly Polarized Pulsar Light
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- Constraints on axionic fuzzy dark matter from light bending and Shapiro time delay
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- Constraints on ultralight axions, vector gauge bosons, and unparticles from geodetic and frame-dragging measurements
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- Prospects for Axion Dark Matter Searches at LISA-like Interferometers
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- Parametric-resonance based phenomenology of gravitating axion configurations