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dc.contributor.authorBertschinger, Edmund
dc.date.accessioned2012-06-11T15:19:01Z
dc.date.available2012-06-11T15:19:01Z
dc.date.issued2011-12
dc.identifier.issn1364-503X
dc.identifier.issn1471-2962
dc.identifier.urihttp://hdl.handle.net/1721.1/71129
dc.description.abstractThe metric of a perturbed Robertson–Walker space–time is characterized by three functions: a scale-factor giving the expansion history and two potentials that generalize the single potential of Newtonian gravity. The Newtonian potential induces peculiar velocities and, from these, the growth of matter fluctuations. Massless particles respond equally to the Newtonian potential and to a curvature potential. The difference of the two potentials, called the gravitational slip, is predicted to be very small in general relativity, but can be substantial in modified gravity theories. The two potentials can be measured, and gravity tested on cosmological scales, by combining weak gravitational lensing or the integrated Sachs–Wolfe effect with galaxy peculiar velocities or clustering.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (grant AST-0708501)en_US
dc.description.sponsorshipKavli Institute for Astrophysics and Space Researchen_US
dc.language.isoen_US
dc.publisherRoyal Society, Theen_US
dc.relation.isversionofhttp://dx.doi.org/10.1098/rsta.2011.0369en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alike 3.0en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/en_US
dc.sourceProf. Bertschinger via Mat Willmotten_US
dc.titleOne Gravitational Potential or Two? Forecasts and Testsen_US
dc.typeArticleen_US
dc.identifier.citationBertschinger, E. “One gravitational potential or two? Forecasts and tests.” Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 369.1957 (2011): 4947-4961.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.approverBertschinger, Edmund
dc.contributor.mitauthorBertschinger, Edmund
dc.relation.journalPhilosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciencesen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.identifier.pmid22084285
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsBertschinger, E.en
dc.identifier.orcidhttps://orcid.org/0000-0003-2480-5973
mit.licenseOPEN_ACCESS_POLICYen_US


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