Testing the paradigm of adiabaticity

Details Testing the paradigm of adiabaticity Testing the paradigm of adiabaticity

2004-02-02

arxiv.org/abs/astro-ph/0402032v1

Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF) Rio de Janeiro, Brazil 20 - 26 July 20

Astronomy and Astrophysics

Astrophysics

Proceedings of the 10th Marcel Grossmann Meeting, Rio de Janeiro, July 2003, 5 pages, 2 figures

Scientific paper

We introduce the concepts of adiabatic (curvature) and isocurvature (entropy) cosmological perturbations and present their relevance for parameter estimation from cosmic microwave background anisotropies data. We emphasize that, while present-day data are in excellent agreement with pure adiabaticity, subdominant isocurvature contributions cannot be ruled out. We discuss model independent constraints on the isocurvature contribution. Finally, we argue that the Planck satellite will be able to do precision cosmology even if the assumption of adiabaticity is relaxed.

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