Relativistic collapse of axion stars

Abstract

We study the gravitational collapse of an axion field in null coordinates, assuming spherical symmetry. Compared with previous studies, we use a simpler numerical scheme which can run, for relevant parameters, in a few minutes or less on a desktop computer. We use it to accurately determine the domains of parameter space in which the axion field forms a black hole, an axion star or a relativistic Bosenova.

arXiv comment7 pages, 5 figures, pdflatex

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• Formation of Relativistic Axion Stars
• Oscillon formation during inflationary preheating with general relativity
• On Approximation Methods in the Study of Boson Stars
• Jeans mass-radius relation of self-gravitating Bose-Einstein condensates and typical parameters of the dark matter particle
• Oscillon collapse to black holes
• The Fate of Dense Scalar Stars
• Can the GW190814 secondary component be a bosonic dark matter admixed compact star?
• Possible evidence of QCD axion stars in HSC and OGLE microlensing events
• Maximum mass of relativistic self-gravitating Bose-Einstein condensates with repulsive or attractive $|\phi {|}^4$ self-interaction
• Soliton Merger Rates and Enhanced Axion Dark Matter Decay
• A Conjecture on the Minimal Size of Bound States
• Core mass -- halo mass relation of bosonic and fermionic dark matter halos harbouring a supermassive black hole
• Electromagnetic instability of compact axion stars
• Stability of Condensed Fuzzy Dark Matter Halos
• Quantum tunneling rate of dilute axion stars close to the maximum mass
• A review on radiation of oscillons and oscillatons
• Global View of Axion Stars with (Nearly) Planck-Scale Decay Constants
• Astrophysical Searches and Constraints on Ultralight Bosonic Dark Matter
• Multimessenger signals from compact axion star mergers