Challenges to Self-Acceleration in Modified Gravity from Gravitational Waves and Large-Scale Structure

@article{Lombriser2017ChallengesTS,
  title={Challenges to Self-Acceleration in Modified Gravity from Gravitational Waves and Large-Scale Structure},
  author={Lucas Lombriser and Nelson A. Lima},
  journal={Physics Letters B},
  year={2017},
  volume={765},
  pages={382-385}
}
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References

SHOWING 1-10 OF 46 REFERENCES
Cosmological tests of modified gravity.
  • K. Koyama
  • Physics, Medicine
  • Reports on progress in physics. Physical Society
  • 2016
TLDR
An overview of recent developments in modified gravity theories including f(R) gravity, braneworld gravity, Horndeski theory and massive/bigravity theory is given and how to test modifications of gravity on cosmological scales is discussed. Expand
Confirmation of general relativity on large scales from weak lensing and galaxy velocities
TLDR
A test of the applicability of general relativity on cosmological length scales using a quantity that combines measures of large-scale gravitational lensing, galaxy clustering and structure growth rate, reports that EG = 0.39 ± 0.06 on length scales of tens of megaparsecs, in agreement with the general relativistic prediction. Expand
Constraints on f(R) gravity from probing the large-scale structure
We study cosmological constraints on metric f(R) gravity models that are designed to reproduce the LCDM expansion history with modifications to gravity described by a supplementary cosmologicalExpand
Probing gravity at cosmological scales by measurements which test the relationship between gravitational lensing and matter overdensity.
TLDR
Planned surveys will be able to measure E(G), an observational quantity whose expectation value is equal to the ratio of the Laplacian of the Newtonian potentials to the peculiar velocity divergence, to percent accuracy. Expand
Anisotropic stress as a signature of nonstandard propagation of gravitational waves.
TLDR
It is shown that in cosmological solutions of very general classes of models extending gravity-all scalar-tensor theories, Einstein-aether models, and bimetric massive gravity-a direct correspondence exists between perfect fluids apparently carrying anisotropic stress and a modification in the propagation of gravitational waves. Expand
Reproducing GW150914: the first observation of gravitational waves from a binary black hole merger
TLDR
This is the first direct detection of gravitational waves and the first observation of a binary black hole merger, and these observations demonstrate the existence of binary stellar-mass black hole systems. Expand
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods thatExpand
Modified Gravity and Cosmology
Abstract In this review we present a thoroughly comprehensive survey of recent work on modified theories of gravity and their cosmological consequences. Amongst other things, we cover GeneralExpand
No-go theorems for generalized chameleon field theories.
TLDR
It is proved two theorems limiting its cosmological impact: the Compton wavelength of such a scalar can be at most ~/= 1 MPc at the present cosmic density, which restricts its impact to nonlinear scales, and the conformal factor relating Einstein- and Jordan-frame scale factors is essentially constant over the last Hubble time, which precludes the possibility of self-acceleration. Expand
Beyond the Cosmological Standard Model
After a decade and a half of research motivated by the accelerating universe, theory and experiment have a reached a certain level of maturity. The development of theoretical models beyond \Lambda,Expand
...
1
2
3
4
5
...