Phys. Rev. Lett. 95, 171302 (2005) [4 pages]Balance of Dark and Luminous Mass in Rotating GalaxiesReceived 2 March 2005; revised 29 August 2005; published 20 October 2005 A fine balance between dark and baryonic mass is observed in spiral galaxies. As the contribution of the baryons to the total rotation velocity increases, the contribution of the dark matter decreases by a compensating amount. This poses a fine-tuning problem for ΛCDM galaxy formation models, and may point to new physics for dark matter particles or even a modification of gravity. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.171302
DOI:
10.1103/PhysRevLett.95.171302
PACS:
95.35.+d, 98.52.Nr, 98.62.Ck, 98.62.Dm
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