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  1. We review recent progress in the construction of modified gravity models as alternatives to dark energy as well as the development of cosmological tests of gravity. Einstein's theory of General Relativity (GR) has been tested accurately within the local universe i.e. the Solar System, but this leaves the possibility open that it is not a good description of gravity at the largest scales in the ...
    Author:Kazuya KoyamaPublished:2015
  2. cordis.europa.eu

    We construct modified gravity theories as an alternative to dark energy and analyse "screening mechanisms" to restore GR on scales where it is well tested. We then develop better theoretical frameworks to perform cosmological tests of gravity that include non-linear scales by exploiting our theoretical knowledge of the models and our state ...
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  4. ar5iv.labs.arxiv.org

    Unfortunately, we still do not have a model that realises these new ideas in a consistent way. However, clearly it is worthwhile challenging GR in order to address the fundamental problems in theoretical physics. Modified gravity models also provided motivation for developing cosmological tests of gravity (see reviews [12, 13, 11]). It is the ...
  5. iopscience.iop.org

    Once armed with a theoretical knowledge of modified gravity models, we move on to discuss how we can test modifications of gravity on cosmological scales. We present tests of gravity using linear cosmological perturbations and review the latest constraints on deviations from the standard CDM model. Since screening mechanisms leave distinct ...
    Author:Kazuya KoyamaPublished:2016
  6. cordis.europa.eu

    The main focus of the CosTesGrav project was on developing theoretical frameworks and tools for probing gravitational physics on cosmological scales. To do so, researchers started small. "We developed various theoretical tools to provide predictions for cosmological observations on small scales in modified gravity models," notes Koyama.
  7. indico.cern.ch

    Cosmological Tests of Modified Gravity Institute of Cosmology and Gravitation, University of Portsmouth arXiv:1504.04623 ... Song et.al. PRD84 (2011) 083523 Planck 2015 "Modified gravity and dark energy" (Simpson et.al. MNRAS 429 (2013) 2249) WL RSD. Going beyond linear scales
  8. iopscience.iop.org

    We review recent progress in the construction of modified gravity models as alternatives to dark energy as well as the development of cosmological tests of gravity. Einstein's theory of general relativity (GR) has been tested accurately within the local universe i.e. the Solar System, but this leaves the possibility open that it is not a good ...
  9. inspirehep.net

    Once armed with a theoretical knowledge of modified gravity models, we move on to discuss how we can test modifications of gravity on cosmological scales. We present tests of gravity using linear cosmological perturbations and review the latest constraints on deviations from the standard Λ \Lambda Λ CDM model. Since screening mechanisms leave ...
  10. iopscience.iop.org

    to test gravity using astrophysical objects. We will review recent developments in models of modified gravity and explain why the realisation of a screening mech-anism is important in these models. We then discuss how we test gravity on cosmological scales and emphasise the impor-tance of understanding the non-linear structure formation.

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