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Problems and Alternatives to Lambda Cold Dark Matter - Berkeley ...

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Velocity predictions<br />

Jesús Zavala, et. al. The Astrophysical Journal, 700:1779–1793, 2009 August 1<br />

The simulation with CDM predicts<br />

a steep rise in the VF <strong>to</strong>ward lower<br />

velocities; for Vmax = 35 km/s, it<br />

forecasts ∼10 times more sources<br />

than the ones observed. If<br />

confirmed by the complete<br />

ALFALFA survey, these results<br />

indicate a potential problem for the<br />

CDM paradigm<br />

24

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