Late-time phase transition and the galactic halo as a Bose liquid
Abstract
We consider the ultralight pseudo Nambu-Goldstone boson appearing in the late-time cosmological phase tansition theories as a major dark matter candidate. Since it is almost massless, its nature is more wavelike than particlelike. We study quantum mechanically how they from a galactic halo. Three predictions are made: (i) the mass profile ρ~r-1.6 (ii) there are ripplelike fine structures in the rotation curve; (iii) the rotation velocity multiplied by the ripple's wavelength is galaxy independent.
- Publication:
-
Physical Review D
- Pub Date:
- September 1994
- DOI:
- 10.1103/PhysRevD.50.3650
- arXiv:
- arXiv:hep-ph/9205208
- Bibcode:
- 1994PhRvD..50.3650S
- Keywords:
-
- 95.35.+d;
- 98.62.Gq;
- 98.80.Cq;
- Dark matter;
- Galactic halos;
- Particle-theory and field-theory models of the early Universe;
- High Energy Physics - Phenomenology;
- Astrophysics
- E-Print:
- 4 pages 3 figs (Top-drawer file will be sent upon request)