Reinterpreting dark energy through backreaction: the minimally coupled morphon field

Details Reinterpreting dark energy through backreaction: the minimally coupled morphon field Reinterpreting dark energy through backreaction: the minimally coupled morphon field

2006-12-29

arxiv.org/abs/astro-ph/0612774v1

Astronomy and Astrophysics

Astrophysics

Prepared fro the proceedings of the 11th Marcel Grossmann meeting, Berlin, July 23-29 2006

Scientific paper

In the context of averaged cosmologies, the effective equations can be written in the form of "regional" Friedmannian equations with additional sources arising from the so-called backreaction of inhomogeneities. We propose a mean field description of this backreaction in terms of a regionally homogeneous scalar field: this provides a physical motivation to the phenomenological scalar fields generically called quintessence fields. We explicitly reconstruct the potential of the scalar field for a one-parameter family of scaling solutions to the backreaction problem, showing that it entails most of the standard scalar fields including e.g. standard and phantom quintessence scenarii.

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