Axion Minicluster Halo Limits from Wide Binary Disruption

2024/09/04 by Zihang Wang, Yu Gao, Wang, Zihang +1 · 3 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Cosmology and Gravitation Theories #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2409.02468

Abstract

Axionic dark matter can form miniclusters and minicluster halos from inhomogenuities in the early Universe. If MCHs are sufficiently massive, their existence can be revealed by small-scale gravitational tidal perturbation to halo-like binary star system in the Galaxy. The observed population of the Milky Way's wide-separation binaries with a\gtrsimO(0.1) parsec offer a sensitive test to dynamic evaporation from MCHs. Considering data from recent GAIA observations, we derive significant constraints on the MCH fraction of the galactic dark matter halo. For several scenarios including dense MCHs and isolated minicluster models, these limits will apply to axion-like particles in the mass range m_a∼ 10^-15-10^-12 \rm eV and m_a∼ 10^-19-10^-16 \rm eV, respectively.

Cited by

• Discovery prospects for photophobic axion-like particles at a 100 TeV proton--proton collider
• Discovery prospects for photophobic axion-like particles in the WWjj final state at the High-Luminosity LHC
• Axion Star Bosenova in Axion Miniclusters

Related

• Disruption of Dark Matter Minihaloes in the Milky Way environment: Implications for Axion Miniclusters and Early Matter Domination
• Enhanced Disruption of Axion Minihalos by Multiple Stellar Encounters in the Milky Way
• Using Axion Miniclusters to Disentangle the Axion-photon Coupling and the Dark Matter Density
• Miniclusters from axion string simulations
• Low-mass stars and star clusters in the dark Galactic halo