Finding new signature effects on galactic dynamics to constrain Bose-Einstein-condensed cold dark matter

Abstract

If cosmological cold dark matter (CDM) consists of light enough bosonic particles that their phase-space density exceeds unity, they will comprise a Bose-Einstein condensate (BEC). The nature of this BEC-CDM as a quantum fluid may then distinguish it dynamically from the standard form of CDM involving a collisionless gas of non-relativistic particles that interact purely gravitationally. We summarize some of the dynamical properties of BEC-CDM that may lead to observable signatures in galactic halos and present some of the bounds on particle mass and self-interaction coupling strength that result from a comparison with observed galaxies.

10 pages, 5 figures; Minor corrections to reflect the published version

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• The Logotropic Dark Fluid as a unification of dark matter and dark energy
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• Cosmological evolution of a complex scalar field with repulsive or attractive self-interaction
• Axions: Bose Einstein Condensate or Classical Field?
• Relativistic self-gravitating Bose-Einstein condensates and cold baryons with a stiff equation of state
• Dark matter as a Bose--Einstein Condensate: the relativistic non-minimally coupled case
• Derivation of the core mass -- halo mass relation of fermionic and bosonic dark matter halos from an effective thermodynamical model
• Landau equation for self-gravitating classical and quantum particles: Application to dark matter
• Jeans mass-radius relation of self-gravitating Bose-Einstein condensates and typical parameters of the dark matter particle
• Comparison between the Logotropic and $\Lambda$CDM models at the cosmological scale
• Maximum mass of relativistic self-gravitating Bose-Einstein condensates with repulsive or attractive $|\phi {|}^4$ self-interaction
• Core mass -- halo mass relation of bosonic and fermionic dark matter halos harbouring a supermassive black hole
• Stability of self-gravitating Bose-Einstein-Condensates
• A heuristic wave equation parameterizing BEC dark matter halos with a quantum core and an isothermal atmosphere
• Quantum tunneling rate of dilute axion stars close to the maximum mass
• Testing Non-minimally Coupled BEC Dark Matter with Gravitational Waves
• On particle scattering in Gross-Pitaevskii theory and implications for dark matter halos
• The Pressure of Misalignment Axions: a Difference from WIMPs in Galaxy Formation?