Cited by 12Cosmology and Gravitation TheoriesDark Matter and Cosmic PhenomenaNoncommutative and Quantum Gravity Theories

Test of the Equivalence Principle in the Dark sector on galactic scales

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Mohapi, N., Hees, A., Larena, J.·2016·Journal of Cosmology and Astroparticle Physics

Abstract

The Einstein Equivalence Principle is a fundamental principle of the theory of General Relativity. While this principle has been thoroughly tested with standard matter, the question of its validity in the Dark sector remains open. In this paper, we consider a general tensor-scalar theory that allows to test the equivalence principle in the Dark sector by introducing two different conformal couplings to standard matter and to Dark matter. We constrain these couplings by considering galactic observations of strong lensing and of velocity dispersion. Our analysis shows that, in the case of a violation of the Einstein Equivalence Principle, data favour violations through coupling strengths that are of opposite signs for ordinary and Dark matter. At the same time, our analysis does not show any significant deviations from General Relativity.

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Crossref · 10.1088/1475-7516/2016/03/032

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  • Mohapi et al. (2016) constrain such a coupling from galactic observations of strong lensing and velocity dispersion, showing that data favor violations through coupling strengths of opposite signs for ordinary and dark matter even though no deviation from GR.

    “Mohapi et al. (2016) constrain such a coupling from galactic observations of strong lensing and of velocity dispersion, showing that data favor violations through coupling strengths that are of opposite signs for ordinary and dark matter even though no deviation from GR.”

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Research works printed but not linked: 8

  1. O. Minazzoli and A. Hees, On dilatons with intrinsic decouplings, arXiv:1512.05232 [INSPIRE]. · arXiv
  2. P. Schneider, J. Ehlers and E.E. Falco, Gravitational Lenses, Springer-Verlag Berlin Heidelberg (1992).
  3. J. Binney and S. Tremaine, Galactic Dynamics, second edition, Princeton University Press, 2008
  4. Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, arXiv:1502.01589 [INSPIRE]. · arXiv
  5. S. Klugman, H. Panjer and G. Willmot, Loss Models: From Data to Decisions, Wiley Series in Probability and Statistics, Wiley (2012).
  6. P. Gregory, Bayesian Logical Data Analysis for the Physical Sciences, Cambridge University Press, New York (2010).
  7. SKA Cosmology SWG collaboration, R. Maartens et al., Overview of Cosmology with the SKA, PoS(AASKA14)016 [arXiv:1501.04076] [INSPIRE]. · arXiv
  8. P. Peter and J. Uzan, Primordial Cosmolgy, Oxford University Press, New York (2009).

Cited by

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Authors
Mohapi, N., Hees, A., & Larena, J.
Affiliations
Rhodes University (ZA)
Venue
Journal of Cosmology and Astroparticle Physics
Published
2016-03-17
Volume
2016
Issue
03
Pages
032-032
ISSN
  • 1475-7508 (ISSN-L)
  • 1475-7516
OpenAlex
W1834343292
Cited by
12
References
92
Citations by year
2025: 1 · 2024: 1 · 2021: 2 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 3
FWCI
1.28
Type
journal article
Language
en
Open access
Locations
  • Journal of Cosmology and Astroparticle Physics (publishedVersion)
  • arXiv (Cornell University) (acceptedVersion)
  • arXiv (Cornell University)
Funders
National Research Foundation
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
Keywords
Einstein equivalence principle, dark sector, dark matter, conformal coupling, strong gravitational lensing, velocity dispersion, galactic scales, modified gravity, tests of general relativity

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