Axiverse and Black Hole

Abstract

String theory/M-theory generally predicts that axionic fields with a broad mass spectrum extending below 10^{-10}eV are produced after compactification to four dimensions. These axions/fields provoke a rich variety of cosmophysical phenomena on different scales depending on their masses and provide us new windows to probe the ultimate theory. In this article, after overviewing this axiverse idea, I take up the black hole instability as the most fascinating one among such axionic phenomena and explain its physical mechanism and astrophysical predictions.

References added; 32 pages, 24 figures. Based on the lecture at the 2011 Shanghai Asia-Pacific School and Workshop on Gravitation

References in corpus (9)

• Quasinormal modes of black holes: from astrophysics to string theory
• Flux Compactification
• Instability of the massive Klein-Gordon field on the Kerr spacetime
• Improved constraints on non-Newtonian forces at 10 microns
• Ultra-Light Scalar Fields and the Growth of Structure in the Universe
• Perturbations and Stability of Static Black Holes in Higher Dimensions
• Superradiance and Instability of Black Holes
• Perturbations and Stability of Higher-Dimensional Black Holes
• Unifying cosmological and recent time variations of fundamental couplings

Cited by in corpus (33)

• Testing General Relativity with Present and Future Astrophysical Observations
• Gravitational Wave Tests of General Relativity with Ground-Based Detectors and Pulsar Timing Arrays
• Massive spin-2 fields on black hole spacetimes: Instability of the Schwarzschild and Kerr solutions and bounds on the graviton mass
• Black holes as particle detectors: evolution of superradiant instabilities
• Superradiant instabilities in astrophysical systems
• Stationary Scalar Clouds Around Rotating Black Holes
• Superradiant instabilities of rotating black holes in the time domain
• Gravitational radiation from an axion cloud around a black hole: Superradiant phase
• Black holes and fundamental fields in Numerical Relativity: initial data construction and evolution of bound states
• Stability of black holes in Einstein-charged scalar field theory in a cavity
• Black hole solutions in Einstein-charged scalar field theory
• Instability of the Proca field on Kerr spacetime
• Bosenova and Axiverse
• Spontaneous growth of vector fields in gravity
• Nonlinear interactions between black holes and Proca fields
• Scalar field effects on the orbit of S2 star
• Black holes in massive gravity
• The Spectrum of the Axion Dark Sector
• Black hole bombs and explosions: from astrophysics to particle physics
• Schwarzschild scalar wigs: spectral analysis and late time behavior
• Using the motion of S2 to constrain scalar clouds around SgrA*
• Probing the string axiverse by gravitational waves from Cygnus X-1
• Imprints of Axion Superradiance in the CMB
• Generation of large-scale magnetic fields, non-Gaussianity, and primordial gravitational waves in inflationary cosmology
• Scalar field perturbation around a rotating hairy black hole: quasinormal modes, quasibound states and superradiant instability
• Astrophysical black holes as natural laboratories for fundamental physics and strong-field gravity
• Near-horizon microstructure and superradiant instability of black holes
• Getting More Out of Black Hole Superradiance: a Statistically Rigorous Approach to Ultralight Boson Constraints from Black Hole Spin Measurements
• On the Interaction between Ultralight Bosons and Quantum-Corrected Black Holes
• Conditions for superradiant instability of the Kerr-Newman black holes
• Fundamental fields around compact objects: Massive spin-2 fields, Superradiant instabilities and Stars with dark matter cores
• Massive scalar clouds and black hole spacetimes in Gauss-Bonnet gravity
• General spherical harmonic bra-ket overlap integrals of trigonometric functions