The spectrum of cosmological density fluctuations and nature of dark matter

Details The spectrum of cosmological density fluctuations and nature of dark matter The spectrum of cosmological density fluctuations and nature of dark matter

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.359..396t&link_type=abstract

Nature (ISSN 0028-0836), vol. 359, no. 6394, p. 396-399.

Astronomy and Astrophysics

Astronomy

156

Cosmology, Dark Matter, Density (Mass/Volume), Galactic Evolution, Grand Unified Theory, Astronomical Models, Background Radiation, Hubble Constant, Infrared Astronomy, Microwave Emission

Scientific paper

An array of cosmological structure formation models are examined and it is shown that most are ruled out by the results of COBE measurements of the microwave background fluctuations and the QDOT IRAS redshift survey. Only one completely satisfactory model is found, in which the universe has a density Omega = 1, with 69 percent in the form of cold dark matter, 30 percent provided by hot dark matter in the form of a stable neutrino with mass 7.5 eV, and 1 percent baryonic. Certain GUTs may provide a physical basis for such hybrid models. A Hubble constant of 50 km/s/Mpc is preferred to one of 100.

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