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Regular readers to GA&C here in PF will know only too well that some of our prolific posters feel the mainstream work is rather too heavily model-laden for their taste ... and others that this characterisation quite unfair.
Wrt those who are comfortable with the redshifts of galaxies (and SN) being mostly cosmological, and who would like some reassurance that the leading researchers aren't ignoring alternatives (esp to GR), I recently came across this paper, by Tegmark: "Measuring the metric: a parametrized post-Friedmanian approach to the cosmic dark energy problem" (astro-ph/0101354). The abstract says, in part "We argue for a “parametrized post-Friedmanian” approach to linear cosmology, where the history of expansion and perturbation growth is measured without assuming that the Einstein Field Equations hold"
Wrt those who are comfortable with the redshifts of galaxies (and SN) being mostly cosmological, and who would like some reassurance that the leading researchers aren't ignoring alternatives (esp to GR), I recently came across this paper, by Tegmark: "Measuring the metric: a parametrized post-Friedmanian approach to the cosmic dark energy problem" (astro-ph/0101354). The abstract says, in part "We argue for a “parametrized post-Friedmanian” approach to linear cosmology, where the history of expansion and perturbation growth is measured without assuming that the Einstein Field Equations hold"