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Cosmological perfect fluids in Gauss-Bonnet gravity
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Cosmological perfect fluids in Gauss-Bonnet gravity
classification
gr-qc
astro-ph.COhep-th
keywords
cosmologicalgauss-bonnetgravityanalyticalassociatedcomponentscurvaturedark
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In an $n$-dimensional Friedmann-Robertson-Walker metric, it is rigorously shown that any analytical theory of gravity $f(R,{\cal G})$, where $R$ is the curvature scalar and $\cal G$ is the Gauss-Bonnet topological invariant, can be associated to a perfect-fluid stress-energy tensor. In this perspective, dark components of the cosmological Hubble flow can be geometrically interpreted.
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