Phys. Rev. D 50, 3650–3654 (1994)Late-time phase transition and the galactic halo as a Bose liquidReceived 28 March 1994; published in the issue dated 15 September 1994 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. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.50.3650
DOI:
10.1103/PhysRevD.50.3650
PACS:
95.35.+d, 98.62.Gq, 98.80.Cq
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