Axion structure formation – II. The wrath of collapse
- Institut für Astrophysik, Georg-August Universität Göttingen, Göttingen, D-Deutschland 37707, Germany, Department of Physics, University of Washington, Seattle, WA 98195-1560, USA
- Department of Astronomy, University of Washington, Seattle, WA 98195-1580, USA
- Department of Physics, University of Washington, Seattle, WA 98195-1560, USA
ABSTRACT The first paper in this series showed that quantum chromodynamic axion dark matter, as a highly correlated Bose fluid, contains extra-classical physics on cosmological scales. The source of the derived extra-classical physics is exchange–correlation interactions induced by the constraints of symmetric particle exchange and interaxion correlations from self-gravitation. The paper also showed that the impact of extra-classical physics on early structure formation is marginal, as the exchange–correlation interaction is inherently non-linear. This paper continues the study of axion structure formation into the non-linear regime, considering the case of full collapse and virialization. The N-body method is chosen to study the collapse, and its algorithms are derived for a condensed Bose fluid. Simulations of isolated gravitational collapse are performed for both Bose and cold dark matter fluids using a prototype N-body code. Unique Bose structures are found to survive even the most violent collapses. Bose post-collapse features include dynamical changes to global structures, creation of new broad sub-structures, violations of classical binding energy conditions, and new fine structures. Effective models of the novel structures are constructed and possibilities for their observation are discussed.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- NONE; SC0011665
- OSTI ID:
- 1607601
- Alternate ID(s):
- OSTI ID: 1802236
- Journal Information:
- Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 4 Vol. 493; ISSN 0035-8711
- Publisher:
- Oxford University PressCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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