Derives the joint PDF for squared peculiar velocities at separated points and shows that neglecting directional anisotropy in velocity correlations causes errors of a few percent or less in 21-cm fluctuation predictions.
Standard Ruler at Cosmic Dawn
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Peculiar-velocity distribution functions and 21-cm fluctuations
Derives the joint PDF for squared peculiar velocities at separated points and shows that neglecting directional anisotropy in velocity correlations causes errors of a few percent or less in 21-cm fluctuation predictions.