ΔT / T and the isotropy of the universe

Using a covariant and gauge-invariant formula for the temperature of the cosmic microwave background at the present time in terms of physical quantities, we prove that the small quadrupole component of the cosmic microwave background temperature found by COBE implies that if the universe is homogeneous but anisotropic (Bianchi type I) then necessarily must be a small departure from the flat Friedmann model.

This work has been supported by the European Community under contract number ERBCHRXCT920079 and the Spanish DGICYT, project number PB92-0434-C02-02 for partial financial support.

Peer reviewed

Country

Spain

Related Organizations

Spanish National Research Council
Spain

Keywords

Cosmology: miscellaneous, Cosmology: theory

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