No slip gravity

@article{Linder2018NoSG,
  title={No slip gravity},
  author={Eric V. Linder},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2018},
  volume={2018},
  pages={005 - 005}
}
  • E. Linder
  • Published 4 January 2018
  • Physics, Geology
  • Journal of Cosmology and Astroparticle Physics
A subclass of the Horndeski modified gravity theory we call No Slip Gravity has particularly interesting properties: 1) a speed of gravitational wave propagation equal to the speed of light, 2) equality between the effective gravitational coupling strengths to matter and light, Gmatter and Glight, hence no slip between the metric potentials, yet difference from Newton's constant, and 3) suppressed growth to give better agreement with galaxy clustering observations. We explore the… 
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69 Citations
Highly Influential Citations
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Background Citations
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Methods Citations
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Results Citations
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References

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In many generalized models of gravity, perfect fluids in cosmology give rise to gravitational slip. Simultaneously, in very broad classes of such models, the propagation of gravitational waves is…
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TLDR
It is shown that the dark-matter growth rate must now be at least as fast as in general relativity (GR), with the possible exception of that beyond the Horndeski model, and if there is any scale dependence at all in the slip parameter, it is such that it takes the GR value at large scales.
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TLDR
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