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Averaging inhomogeneities in scalar-tensor cosmology

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The backreaction of inhomogeneities on the cosmic dynamics is studied in the context of scalar-tensor gravity. Due to terms of indefinite sign in the non-canonical effective energy tensor of the Brans-Dicke-like scalar field, extra contributions to the cosmic acceleration can arise. Brans-Dicke and metric f® gravity are presented as specific examples.

This talk is part of the DAMTP Friday GR Seminar series.

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