Gauge-invariant density fluctuations in a cold dark matter universe

Details Gauge-invariant density fluctuations in a cold dark matter universe Gauge-invariant density fluctuations in a cold dark matter universe

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phlb..149..328m&link_type=abstract

Physics Letters B, Volume 149, Issue 4-5, p. 328-332.

Physics

5

Scientific paper

Adiabatic density fluctuations of a cold collisionless gas in a radiation background are examined using a gauge-invariant formalism. Particular attention is paid to fluctuations which cross the horizon during the radiation-dominated era. The resulting density spectrum invalidates previous arguments that a Zel'dovich primordial fluctuation spectrum is not consistent with an axion-dominated universe.

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