Can QCD Axion Stars explain Subaru HSC microlensing?
arXiv:2109.13153 · doi:10.1103/PhysRevD.104.103020
Abstract
A non-negligible fraction of the QCD axion dark matter may form gravitationally bound Bose Einstein condensates, which are commonly known as axion stars or axion clumps. Such astrophysical objects have been recently proposed as the cause for the single candidate event reported by Subaru Hyper Suprime-Cam (HSC) microlensing search in the Andromeda galaxy. Depending on the breaking scale of the Peccei-Quinn symmetry and the details of the dark matter scenario, QCD axion clumps may form via gravitational condensation during radiation domination, in the dense core of axion miniclusters, or within axion minihalos around primordial black holes. We analyze all these scenarios and conclude that the microlensing candidate detected by the Subaru HSC survey is likely not caused by QCD axion stars.
arXiv comment7 pages, 2 figures. V2: Updated towards version published in Physical Review D
References in corpus (65)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
- Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
- String Axiverse
- Axions In String Theory
- Constraints on Primordial Black Holes
- Primordial Black Holes as Dark Matter
- Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
- Flux Compactification
- Astrophysical Implications of the Binary Black-Hole Merger GW150914
- The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
- The QCD axion, precisely
- A Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment
- Discovering the QCD Axion with Black Holes and Gravitational Waves
- Understanding the Core-Halo Relation of Quantum Wave Dark Matter, DM, from 3D Simulations
- Microlensing constraints on primordial black holes with the Subaru/HSC Andromeda observation
- Mass-radius relation of Newtonian self-gravitating Bose-Einstein condensates with short-range interactions: I. Analytical results
- Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates
- Axion Miniclusters and Bose Stars
- The Rate of Binary Black Hole Mergers Inferred from Advanced LIGO Observations Surrounding GW150914
- Axion dark matter from topological defects
- Do Dark Matter Axions Form a Condensate with Long-Range Correlation?
- Gravitational Bose-Einstein condensation in the kinetic regime
- Non-Linear Axion Dynamics and Formation of Cosmological Pseudo-Solitons
- Axions from Strings: the Attractive Solution
- Did NANOGrav see a signal from primordial black hole formation?
- More Axions from Strings
- Early-Universe Simulations of the Cosmological Axion
- Production of dark matter axions from collapse of string-wall systems
- Formation and structure of ultralight bosonic dark matter halos
- Dilute and dense axion stars
- Primordial Black Hole Formation in a Double Inflation Model in Supergravity
- Early seeds of axion miniclusters
- Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves
- Relativistic axions from collapsing Bose stars
- Growth of structure seeded by primordial black holes
- Large-amplitude isothermal fluctuations and high-density dark-matter clumps
- Formation and mass growth of axion stars in axion miniclusters
- Improved estimation of radiated axions from cosmological axionic strings
- Structure Formation and Microlensing with Axion Miniclusters
- Axion cold dark matter in non-standard cosmologies
- Can Decaying Particles Raise the Upperbound on the Peccei-Quinn Scale?
- Subaru through a different lens: microlensing by extended dark matter structures
- Astrophysical Effects of Scalar Dark Matter Miniclusters
- Dark Matter Axion Clump Resonance of Photons
- Analysis of Dark Matter Axion Clumps with Spherical Symmetry
- Femtolensing and Picolensing by Axion Miniclusters
- Search for intermediate mass black hole binaries in the first observing run of Advanced LIGO
- NANOGrav results and LIGO-Virgo primordial black holes in axion-like curvaton model
- Dark Matter Density Spikes around Primordial Black Holes
- Supplement: The Rate of Binary Black Hole Mergers Inferred from Advanced LIGO Observations Surrounding GW150914
- Gravitational microlensing by dark matter in extended structures
- Instability of rotating Bose stars
- Merger of Dark Matter Axion Clumps and Resonant Photon Emission
- Stellar Disruption of Axion Miniclusters in the Milky Way
- Scalar Dark Matter Clumps with Angular Momentum
- Axion Star Nucleation in Dark Minihalos around Primordial Black Holes
- Radio signatures from encounters between Neutron Stars and QCD-Axion Minihalos around Primordial Black Holes
- Dipole Radiation and Beyond from Axion Stars in Electromagnetic Fields
- Probing Relativistic Axions from Transient Astrophysical Sources
- Microlensing constraints on axion stars including finite lens and source size effects
- Shining Primordial Black Holes
- Can Primordial Black Holes as all Dark Matter explain Fast Radio Bursts?
- Diluted Axion Star Collisions with Neutron Stars
- Can axion clumps be formed in a pre-inflationary scenario?