Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-30
Phys.Rev.D74:023512,2006
Astronomy and Astrophysics
Astrophysics
Submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevD.74.023512
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.
Knox Lloyd
Song Yong-Seon
Tyson Anthony J.
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