Fuzzy Cold Dark Matter: The Wave Properties of Ultralight Particles
«Мутное» холодное тёмное вещество: волновые свойства ультралёгких частиц
2000-08-07
SCID: 54.1/eeb9zyfr
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Bose-Einstein condensateFuzzy Cold Dark Mattersuppression of small-scale linear powerultralight scalar particleswave properties of dark matter
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Abstract (AI)
Cold dark matter (CDM) models predict small-scale structure in excess of observations of the cores and abundance of dwarf galaxies. These problems might be solved, and the virtues of CDM models retained, even without postulating ad hoc dark matter particle or field interactions, if the dark matter is composed of ultralight scalar particles (m approximately 10(-22) eV), initially in a (cold) Bose-Einstein condensate, similar to axion dark matter models. The wave properties of the dark matter stabilize gravitational collapse, providing halo cores and sharply suppressing small-scale linear power.
Key Findings
1
No additional dark matter interactions are required; the effects arise from the quantum/wave nature of the ultralight scalar field.
2
The model sharply suppresses small-scale linear power, reducing excess predicted small-scale structure and dwarf galaxy abundance.
3
Ultralight scalar dark matter with mass ~10^(-22) eV (a cold Bose-Einstein condensate) can retain CDM virtues while addressing small-scale issues.
4
Wave properties of such ultralight particles stabilize gravitational collapse and produce halo cores, resolving core-cusp discrepancies.
Research Object
Ultralight scalar (fuzzy) cold dark matter composed of ~10^-22 eV particles in a cold Bose–Einstein condensate
Research Subject
Wave properties of this ultralight dark matter and their effect on gravitational collapse, halo core formation, and suppression of small-scale linear power
Publication Details
Publication Date
2000-08-07
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