Interpretation of the cosmic microwave background radiation anisotropy detected by the COBE Differential Microwave Radiometer

Details Interpretation of the cosmic microwave background radiation anisotropy detected by the COBE Differential Microwave Radiometer Interpretation of the cosmic microwave background radiation anisotropy detected by the COBE Differential Microwave Radiometer

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396l..13w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 396, no. 1, Sept. 1, 1992, p. L13-L18. Research supported by NASA

Mathematics

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411

Cosmic Background Explorer Satellite, Dark Matter, Gravitational Fields, Microwave Radiometers, Relic Radiation, Astronomical Models, Galactic Clusters

Scientific paper

The large-scale cosmic background anisotropy detected by the COBE Differential Microwave Radiometer (DMR) instrument is compared to the sensitive previous measurements on various angular scales, and to the predictions of a wide variety of models of structure formation driven by gravitational instability. The observed anisotropy is consistent with all previously measured upper limits and with a number of dynamical models of structure formation. For example, the data agree with an unbiased cold dark matter (CDM) model with H0 = 50 km/s Mpc and Delta-M/M = 1 in a 16 Mpc radius sphere. Other models, such as CDM plus massive neutrinos (hot dark matter (HDM)), or CDM with a nonzero cosmological constant are also consistent with the COBE detection and can provide the extra power seen on 5-10,000 km/s scales.

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