Parametrizations for tests of gravity

Aug 20, 2018
37 pages
Published in:
  • Int.J.Mod.Phys.D 27 (2018) 15, 1848002
  • Published: Aug 20, 2018
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Abstract: (WSP)
With the increasing wealth of high-quality astronomical and cosmological data and the manifold departures from General Relativity in principle conceivable, the development of generalized parametrization frameworks that unify gravitational models and cover a wide range of length scales and a variety of observational probes to enable systematic high-precision tests of gravity has been a stimulus for intensive research. A review is presented here for some of the formalisms devised for this purpose, covering the cosmological large- and small-scale structures, the astronomical static weak-field regime as well as emission and propagation effects for gravitational waves. This includes linear and nonlinear parametrized post-Friedmannian frameworks, effective field theory approaches, the parametrized post-Newtonian expansion, the parametrized post-Einsteinian formalism as well as an inspiral-merger-ringdown waveform model among others. Connections between the different formalisms are highlighted where they have been established and a brief outlook is provided for general steps towards a unified global framework for tests of gravity and dark sector models.
Note:
  • 37 pages; published as part of the IJMPD special issue "Modified Gravity: Progresses and Outlook of Theories, Numerical Techniques and Observational Tests" edited by Baojiu Li and Kazuya Koyama
  • 04.50.Kd
  • 04.80.−y
  • 98.80.−k
  • 98.65.Dx
  • 04.30.−w
  • 04.25.Nx
  • Modified gravity
  • cosmology
  • large-scale structure
  • gravitational waves