Work

Distance-redshift and growth-redshift relations as two windows on acceleration and gravitation: Dark energy or new gravity?

Year: 2006

Type: article

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.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.74.023512

Authors: Lloyd Knox, Yong-Seon Song, J. Anthony Tyson

Institutions: University of California, Davis, University of Chicago

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, National Aeronautics and Space Administration

Awards: The Deep Lens Survey, Theoretical Investigations of SZ Effects and Small-scale CMB Polarization and Temperature Anisotropies