{DELTA}T/T and the isotropy of the universe.
Abstract
Using a covariant and gaugeinvariant 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.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 August 1995
 Bibcode:
 1995A&A...300..346M
 Keywords:

 COSMOLOGY: THEORY;
 COSMOLOGY: MISCELLANEOUS