Friedmann-free limits on spatial curvature
Centre de Saclay, Irfu/SPP,
Received: 24 June 2011
Accepted: 30 July 2011
We discuss limits on cosmological spatial curvature that can be derived without imposing the geometry-density relation required by the Friedmann equation. In particular, studies of the expansion history using stellar evolution in passive galaxies imply a curvature radius greater than the Hubble distance.
Key words: cosmological parameters
© ESO, 2011