Alternative dark energies with atypical sound speeds

Details Alternative dark energies with atypical sound speeds Alternative dark energies with atypical sound speeds

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47..747b&link_type=abstract

New Astronomy Reviews, Volume 47, Issue 8-10, p. 747-753.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We study the implications on both background and perturbation evolution of introducing a Chaplygin gas component in the universe's ingredients. We perform likelihood analyses using wide-ranging, SN1a, CMB and large scale structure observations to assess whether such a component could be a genuine alternative to a cosmological constant, Λ. We find that the current data favors behavior in an adiabatic Chaplygin gas that is akin to a cosmological constant.

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