Research Article

Extracting Primordial Density Fluctuations

Science  29 May 1998:
Vol. 280, Issue 5368, pp. 1405-1411
DOI: 10.1126/science.280.5368.1405

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The combination of detections of anisotropy in cosmic microwave background radiation and observations of the large-scale distribution of galaxies probes the primordial density fluctuations of the universe on spatial scales varying by three orders of magnitude. These data are found to be inconsistent with the predictions of several popular cosmological models. Agreement between the data and the cold + hot dark matter model, however, suggests that a significant fraction of the matter in the universe may consist of massive neutrinos.

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