Echoes of Gravity

Details Echoes of Gravity Echoes of Gravity

1995-05-22

arxiv.org/abs/astro-ph/9505102v1

Gen.Rel.Grav.27:1023-1030,1995

Astronomy and Astrophysics

Astrophysics

10 pages, self unpacking uuencoded postscript, including 2 figures, to appear in General Relativity and Gravitation

Scientific paper

10.1007/BF02148645

The study of anisotropies in the Cosmic Microwave Background radiation is progressing at a phenomenal rate, both experimentally and theoretically. These anisotropies can teach us an enormous amount about the way that fluctuations were generated and the way they subsequently evolved into the clustered galaxies which are observed today. In particular, on sub-degree scales the rich structure in the anisotropy spectrum is the consequence of gravity-driven acoustic oscillations occurring before the matter in the universe became neutral. The frozen-in phases of these sound waves imprint a dependence on many cosmological parameters, that we may be on the verge of extracting.

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