Exploring degeneracies in modified gravity with weak lensing
Cosmology and Nongalactic Astrophysics
2015-04-22 v2 General Relativity and Quantum Cosmology
Abstract
By considering linear-order departures from general relativity, we compute a novel expression for the weak lensing convergence power spectrum under alternative theories of gravity. This comprises an integral over a 'kernel' of general relativistic quantities multiplied by a theory-dependent 'source' term. The clear separation between theory-independent and -dependent terms allows for an explicit understanding of each physical effect introduced by altering the theory of gravity. We take advantage of this to explore the degeneracies between gravitational parameters in weak lensing observations.
Cite
@article{arxiv.1501.03509,
title = {Exploring degeneracies in modified gravity with weak lensing},
author = {C. Danielle Leonard and Tessa Baker and Pedro G. Ferreira},
journal= {arXiv preprint arXiv:1501.03509},
year = {2015}
}
Comments
17 pages, 7 figures. v2: Minor changes to match version accepted by PRD