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dc.contributor.authorZuntz, J.en
dc.contributor.authorBaker, T.en
dc.contributor.authorFerreira, P. G.en
dc.contributor.authorSkordis, C.en
dc.creatorZuntz, J.en
dc.creatorBaker, T.en
dc.creatorFerreira, P. G.en
dc.creatorSkordis, C.en
dc.date.accessioned2019-12-02T15:34:54Z
dc.date.available2019-12-02T15:34:54Z
dc.date.issued2012
dc.identifier.issn1475-7516
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/59245
dc.description.abstractThere are a number of approaches to testing General Relativity (GR) on linear scales using parameterized frameworks for modifying cosmological perturbation theory. It is sometimes assumed that the details of any given parameterization are unimportant if one uses it as a diagnostic for deviations from GR. In this brief report we argue that this is not necessarily so. First we show that adopting alternative combinations of modifications to the field equations significantly changes the constraints that one obtains. In addition, we show that using a parameterization with insufficient freedom significantly tightens the apparent theoretical constraints. Fundamentally we argue that it is almost never appropriate to consider modifications to the perturbed Einstein equations as being constraints on the effective gravitational constant, for example, in the same sense that solar system constraints are. The only consistent modifications are either those that grant near-total freedom, as in decomposition methods, or ones which map directly to a particular part of theory space. © 2012 IOP Publishing Ltd and Sissa Medialab srl.en
dc.sourceJournal of Cosmology and Astroparticle Physicsen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84863450939&doi=10.1088%2f1475-7516%2f2012%2f06%2f032&partnerID=40&md5=947b40acac0e25446ab6922acc22ce3c
dc.subjectmodified gravityen
dc.subjectcosmological parameters from CMBRen
dc.subjectcosmological parameters from LSSen
dc.subjectintegrated Sachs-Wolfe effecten
dc.titleAmbiguous tests of general relativity on cosmological scalesen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1088/1475-7516/2012/06/032
dc.description.volume2012
dc.description.issue6
dc.author.facultyΣχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences
dc.author.departmentΤμήμα Φυσικής / Department of Physics
dc.type.uhtypeArticleen
dc.description.notes<p>Cited By :21</p>en
dc.source.abbreviationJ.Cosmol.Astroparticle Phys.en
dc.contributor.orcidSkordis, C. [0000-0001-5873-4259]


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