Axion Structure Formation I: The Co-motion Picture
arXiv:1810.09226 · doi:10.1093/mnras/stz488
Abstract
Axions as dark matter is an increasingly important subject in astrophysics and cosmology. Experimental and observational searches are mounting across the mass spectrum of axion-like particles, many of which require detailed knowledge of axion structure over a wide range of scales. Current understanding of axion structures is far from complete, however, due largely to controversy in modeling the candidate's highly-degenerate state. The series Axion Structure Formation seeks to develop a consistent model of QCD axion dark matter dynamics that follows their highly-degenerate nature to the present using novel modeling techniques and sophisticated simulations. This inaugural paper presents the problem of describing many non-relativistic axions with minimal degrees of freedom and constructs a theory of axion infall for the limit of complete condensation. The derived model is shown to contain axion-specific dynamics not unlike the exchange-correlation influences experienced by identical fermions. Perturbative calculations are performed to explore the potential for imprints in early universe structures.
15 pages, 4 figures, submitted to MNRAS
References in corpus (6)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
- Early seeds of axion miniclusters
- The Caustic Ring Model of the Milky Way Halo
- The Milky Way Tomography with SDSS. V. Mapping the Dark Matter Halo
- Condensate Dynamics with Non-Local Interactions
Cited by in corpus (7)
- Small-scale structure of fuzzy and axion-like dark matter
- Squeezing the Axion
- Anomalous scaling at non-thermal fixed points of the sine-Gordon model
- On the single classical field description of interacting scalar fields
- When quantum corrections alter the predictions of classical field theory for scalar field dark matter
- Axion Structure Formation II: The Wrath of Collapse
- Field moment expansion method for interacting Bosonic systems