Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.d3004s&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The remnant thermal radiation from the big bang has cooled into the microwave regime with the expansion of the Universe. Anisotropies of 10-30 ppm in the intensity of this cosmic microwave background (CMB) transmit information to us about the large-scale properties of the Universe back before gravity turned the initial density perturbations into the large nonlinear effects that make understanding our local environment complicated. Recent major advances in observational cosmology, including spectacular data on the CMB anisotropy, describe a spatially flat universe dominated by an unidentified dark energy component, with much of the matter in the universe also being in an unidentified dark form. Future measurements of the CMB anisotropy, fine-scale anisotropy, and polarization promise to reveal even more of the nature of the universe, perhaps even including some hints as to the form of the inflation field itself.
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