Implication of nano-Hertz stochastic gravitational wave background on ultralight axion particles

Abstract

Recently, the Hellings Downs correlation has been observed by different pulsar timing array (PTA) collaborations, such as NANOGrav, European PTA, Parkes PTA, and Chinese PTA. These PTA measurements of the most precise pulsars within the Milky Way show the first evidence for the stochastic gravitational wave background of our Universe. We study the ultralight axion interpretation of the new discovery by investigating the gravitational wave from axion transitions between different energy levels of the gravitational atoms, which are composed of cosmic populated Kerr black holes and their surrounding axion clouds formed through the superradiant process. By Bayesian analysis, we demonstrate that this new observation naturally admits an ultralight axion interpretation around $10^{-21}$eV, which is consistent in magnitude with the typical mass of fuzzy dark matter.

Updated some important citations

References in corpus (29)

• Cold and Fuzzy Dark Matter
• Ultralight scalars as cosmological dark matter
• Axions In String Theory
• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• Science with the space-based interferometer LISA. V: Extreme mass-ratio inspirals
• Exploring the String Axiverse with Precision Black Hole Physics
• Discovering the QCD Axion with Black Holes and Gravitational Waves
• Instability of the massive Klein-Gordon field on the Kerr spacetime
• Axion Cosmology
• Invisible Axion Search Methods
• The distribution and cosmic evolution of massive black hole spins
• Gravitational wave searches for ultralight bosons with LIGO and LISA
• Black Hole Superradiance Signatures of Ultralight Vectors
• Black holes as particle detectors: evolution of superradiant instabilities
• Black Hole Mergers and the QCD Axion at Advanced LIGO
• Gravitational radiation from an axion cloud around a black hole: Superradiant phase
• Linking the spin evolution of massive black holes to galaxy kinematics
• A Practical Theorem on Gravitational Wave Backgrounds
• Probing the existence of ultralight bosons with a single gravitational-wave measurement
• Prospects for observing extreme-mass-ratio inspirals with LISA
• Gravitational Waves as a New Probe of Bose-Einstein Condensate Dark Matter
• Searching for Ultra-light Bosons and Constraining Black Hole Spin Distributions with Stellar Tidal Disruption Events
• Anisotropy of phase transition gravitational wave and its implication for primordial seeds of the Universe
• Imprints of ultralight axions on the gravitational wave and pulsar timing measurement
• Gravitational waves from axions annihilation through quantum field theory

Cited by in corpus (7)

• Transition rate and gravitational wave spectrum from first-order QCD phase transitions
• Fundamental Physics and Cosmology with TianQin
• Dark Matter Spike surrounding Supermassive Black Holes Binary and the Nanohertz Stochastic Gravitational Wave Background
• Self-interaction effects on the Kerr black hole superradiance and their observational implications
• Superradiant instability of area quantized Kerr black hole with discrete reflectivity
• Superradiant dark matter production from primordial black holes: Impact of multiple modes and gravitational wave emission
• Detectability of the Phase Transition Gravitational Waves in the DFSZ axion Model