Two Windows on Acceleration and Gravitation: Dark Energy or New Gravity?
Astrophysics
2010-04-22 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0503644,
title = {Two Windows on Acceleration and Gravitation: Dark Energy or New Gravity?},
author = {L. Knox and Y. -S. Song and J. A. Tyson},
journal= {arXiv preprint arXiv:astro-ph/0503644},
year = {2010}
}
Comments
Submitted to Phys. Rev. Lett