Semiempirical seeded isocurvature cosmogonies

Details Semiempirical seeded isocurvature cosmogonies Semiempirical seeded isocurvature cosmogonies

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...432l...1p&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 432, no. 1, p. L1-L4

Astronomy and Astrophysics

Astrophysics

11

Baryons, Cosmology, Curvature, Entropy, Galactic Evolution, Galaxies, Mass Distribution, Astronomical Models, Background Radiation, Power Spectra

Scientific paper

Main predictions of the baryon isocurvature model for structure formation are reproduced if the primeval entropy per baryon is constant and homogeneity is broken by a clumpy distribution of seed masses. The constant entropy per baryon may reconcile the cosmogony with the standard model for the origin of the light elements. The seeds could be long-lived cosmic field structures of inhomogeneously produced nonbaryonic cold dark matter, if the needed primeval space distribution could be arranged. The constraints from the large-scale distributions of galaxies and the thermal cosmic background radiation require omega approx. 0.1. In some cases the primeval seed rms mass contrast delta rhoc/rhoc exceeds unity on the scale of clusters of galaxies, meaning the fluctuations cannot be Gaussian, which could permit cluster formation in a low-density universe.

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