Distance-redshift and growth-redshift relations as two windows on acceleration and gravitation: Dark energy or new gravity?
Mar, 2005
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Abstract: (arXiv)
Small distortions in the observed shapes of distant galaxies, a cosmic shear due to gravitational lensing, can be used to simultaneously determine the distance-redshift relation, r(z), and the density contrast growth factor, g(z). Both of these functions are sensitive probes of the acceleration. Their simultaneous determination allows for a consistency test and provides sensitivity to physics beyond the standard dark energy paradigm.- dark energy
- astrophysics: acceleration
- gravitation: lens
- power spectrum
- cosmic background radiation
- statistical analysis
- numerical calculations: interpretation of experiments
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