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dc.contributor.authorHojjati, Alireza
dc.contributor.authorZhao, Gong-Bo
dc.contributor.authorPogosian, Levon
dc.contributor.authorSilvestri, Alessandra
dc.contributor.authorCrittenden, Robert
dc.contributor.authorKoyama, Kazuya
dc.date.accessioned2012-07-31T12:13:35Z
dc.date.available2012-07-31T12:13:35Z
dc.date.issued2012-02
dc.date.submitted2011-11
dc.identifier.issn0556-2821
dc.identifier.urihttp://hdl.handle.net/1721.1/71902
dc.description.abstractThe next generation of weak lensing surveys will trace the evolution of matter perturbations and gravitational potentials from the matter dominated epoch until today. Along with constraining the dynamics of dark energy, they will probe the relations between matter overdensities, local curvature, and the Newtonian potential. We work with two functions of time and scale to account for any modifications of these relations in the linear regime from those in the ΛCDM model. We perform a principal component analysis (PCA) to find the eigenmodes and eigenvalues of these functions for surveys like the Dark Energy Survey and Large Synoptic Survey Telescope. This paper builds on and significantly extends the PCA analysis of Zhao et al. [ Phys. Rev. Lett. 103 241301 (2009)] in several ways. In particular, we consider the impact of some of the systematic effects expected in weak lensing surveys. We also present the PCA in terms of other choices of the two functions needed to parametrize modified growth on linear scales, and discuss their merits. We analyze the degeneracy between the modified growth functions and other cosmological parameters, paying special attention to the effective equation of state w(z). Finally, we demonstrate the utility of the PCA as an efficient data compression stage which enables one to easily derive constraints on parameters of specific models without recalculating Fisher matrices from scratch.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (grant no. AST-0708501)en_US
dc.language.isoen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevD.85.043508en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAPSen_US
dc.titleCosmological tests of general relativity: A principal component analysisen_US
dc.typeArticleen_US
dc.identifier.citationSilvestri, Alessandra et al. "Cosmological tests of general relativity: A principal component analysis." Physical Review D 85 (2012): 043508-1-043508-18. http://link.aps.org/doi/10.1103/PhysRevD.85.043508 Copyright 2012 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.approverSilvestri, Alessandra
dc.contributor.mitauthorSilvestri, Alessandra
dc.relation.journalPhysical Review Den_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsHojjati, Alireza; Zhao, Gong-Bo; Pogosian, Levon; Silvestri, Alessandra; Crittenden, Robert; Koyama, Kazuyaen
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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