ASTROPHYSICAL TESTS OF MODIFIED GRAVITY: CONSTRAINTS FROM DISTANCE INDICATORS IN THE NEARBY UNIVERSE

@article{Jain2012ASTROPHYSICALTO,
  title={ASTROPHYSICAL TESTS OF MODIFIED GRAVITY: CONSTRAINTS FROM DISTANCE INDICATORS IN THE NEARBY UNIVERSE},
  author={B. Jain and Vinu Vikram and Jeremy Sakstein},
  journal={The Astrophysical Journal},
  year={2012},
  volume={779}
}
We use distance measurements in the nearby universe to carry out new tests of gravity, surpassing other astrophysical tests by over two orders of magnitude for chameleon theories. The three nearby distance indicators—cepheids, tip of the red giant branch (TRGB) stars, and water masers—operate in gravitational fields of widely different strengths. This enables tests of scalar–tensor gravity theories because they are screened from enhanced forces to different extents. Inferred distances from… 

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References

SHOWING 1-10 OF 57 REFERENCES

Astrophysical tests of modified gravity: the morphology and kinematics of dwarf galaxies

This paper is the third in a series on tests of gravity using observations of stars and nearby dwarf galaxies. We carry out four distinct tests using published data on the kinematics and morphology

Astrophysical tests of gravity: a screening map of the nearby universe

Astrophysical tests of modified gravity theories in the nearby universe have been emphasized recently by Hui 2009 and Jain 2011. A key element of such tests is the screening mechanism whereby general

STELLAR STRUCTURE AND TESTS OF MODIFIED GRAVITY

Theories that attempt to explain cosmic acceleration by modifying gravity typically introduces a long-range scalar force that needs to be screened on small scales. One common screening mechanism is

Confirmation of general relativity on large scales from weak lensing and galaxy velocities

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.

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 cosmological

Tests of modified gravity with dwarf galaxies

In modified gravity theories that seek to explain cosmic acceleration, dwarf galaxies in low density environments can be subject to enhanced forces. The class of scalar-tensor theories, which

Proposal for an observational test of the Vainshtein mechanism.

The observed offset in M87 cannot be explained by this effect unless the scalar force is significantly stronger than gravity, and the systematic offset of compact objects from the galactic plane is discussed as another possible signature.

Deviations from the Local Hubble Flow. I. The Tip of the Red Giant Branch as a Distance Indicator

The properties of the velocity field in the local volume (cz < 550 km s-1) have been difficult to constrain because of a lack of a consistent set of galaxy distances. The sparse observations

Comparison of Distances from RR Lyrae Stars, the Tip of the Red Giant Branch, and Classical Cepheids

The extragalactic distance scale relies heavily on Cepheids. However, it has become clear from observations and pulsation models that the slope and zero point of their P-L relations differ from

The Effect of Metallicity on Cepheid-based Distances

We have used the Wide Field Planetary Camera 2 on board the Hubble Space Telescope to obtain V and I images of seven nearby galaxies. For each, we have measured a distance using the tip of the red
...