Probing Gravity at Cosmological Scales by Measurements which Test the Relationship between Gravitational Lensing and Matter Overdensity

Zhang, Pengjie; Liguori, M.; Bean, Rachel; Dodelson, Scott

doi:10.1103/physrevlett.99.141302

Cited by 407 publications

(452 citation statements)

References 39 publications

Supporting

Mentioning

448

Contrasting

Order By: Relevance

“…The inequality of metric potentials has been exploited to construct different combinations of the information from weak lensing and redshift space galaxy clustering as tests of gravity [949,954,983,[992][993][994]. A comparison of lensing and dynamical cross-power spectra (C gκ and P gv (k), which is proportional to bD v ) was proposed in [992] as a model independent test of gravity.…”

Section: Combining Lensing and Dynamical Cross-correlationsmentioning

confidence: 99%

“…A comparison of lensing and dynamical cross-power spectra (C gκ and P gv (k), which is proportional to bD v ) was proposed in [992] as a model independent test of gravity. This test is in principle immune to galaxy bias, at least to first order, and can also overcome the limitation of sample variance on large scales.…”

Section: Combining Lensing and Dynamical Cross-correlationsmentioning

confidence: 99%

See 1 more Smart Citation

Beyond the cosmological standard model

et al. 2015

View full text Add to dashboard Cite

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 Λ or smooth dark energy, often called modified gravity, has led to broader insights into a path forward, and a host of observational and experimental tests have been developed. In this review we present the current state of the field and describe a framework for anticipating developments in the next decade. We identify the guiding principles for rigorous and consistent modifications of the standard model, and discuss the prospects for empirical tests.We begin by reviewing recent attempts to consistently modify Einstein gravity in the infrared, focusing on the notion that additional degrees of freedom introduced by the modification must "screen" themselves from local tests of gravity. We categorize screening mechanisms into three broad classes: mechanisms which become active in regions of high Newtonian potential, those in which first derivatives of the field become important, and those for which second derivatives of the field are important. Examples of the first class, such as f (R) gravity, employ the familiar chameleon or symmetron mechanisms, whereas examples of the last class are galileon and massive gravity theories, employing the Vainshtein mechanism. In each case, we describe the theories as effective theories and discuss prospects for completion in a more fundamental theory. We describe experimental tests of each class of theories, summarizing laboratory and solar system tests and describing in some detail astrophysical and cosmological tests. Finally, we discuss prospects for future tests which will be sensitive to different signatures of new physics in the gravitational sector.The review is structured so that those parts that are more relevant to theorists vs. observers/experimentalists are clearly indicated, in the hope that this will serve as a useful reference for both audiences, as well as helping those interested in bridging the gap between them.

show abstract

Section: Combining Lensing and Dynamical Cross-correlationsmentioning

confidence: 99%

Section: Combining Lensing and Dynamical Cross-correlationsmentioning

confidence: 99%

Beyond the cosmological standard model

et al. 2015

View full text Add to dashboard Cite

show abstract

“…To reach high precision on cosmological scales, the most promising route is to test for consistency between growth measurements from redshift-space distortions, which respond to the non-relativistic potential Ψ, and growth measurements from weak lensing. Implementing an approach suggested by Zhang et al (2007), Reyes et al (2010) present a form of this test that draws on redshift-space distortion measurements of SDSS luminous red galaxies by Tegmark et al (2006) and galaxy-galaxy lensing measurements of the same population. The precision of the test in Reyes et al (2010) is only ∼ 30%, limited mainly by the redshift-space distortion measurement, but this is already enough to rule out some otherwise viable models.…”

Section: Other Tests Of Modified Gravitymentioning

confidence: 99%

Observational probes of cosmic acceleration

et al. 2013

View full text Add to dashboard Cite

The accelerating expansion of the universe is the most surprising cosmological discovery in many decades, implying that the universe is dominated by some form of "dark energy" with exotic physical properties, or that Einstein's theory of gravity breaks down on cosmological scales. The profound implications of cosmic acceleration have inspired ambitious efforts to understand its origin, with experiments that aim to measure the history of expansion and growth of structure with percent-level precision or higher. We review in detail the four most well established methods for making such measurements: Type Ia supernovae, baryon acoustic oscillations (BAO), weak gravitational lensing, and the abundance of galaxy clusters. We pay particular attention to the systematic uncertainties in these techniques and to strategies for controlling them at the level needed to exploit "Stage IV" dark energy facilities such as BigBOSS, LSST, Euclid, and WFIRST. We briefly review a number of other approaches including redshift-space distortions, the Alcock-Paczynski effect, and direct measurements of the Hubble constant H 0 . We present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data. We also show the level of precision required for clusters or other methods to provide constraints competitive with those of these fiducial programs. We emphasize the value of a balanced program that employs several of the most powerful methods in combination, both to cross-check systematic uncertainties and to take advantage of complementary information. Surveys to probe cosmic acceleration produce data sets that support a wide range of scientific investigations, and they continue the longstanding astronomical tradition of mapping the universe in ever greater detail over ever larger scales.

show abstract

“…As the background data constrains quite tightly Ω m ≈ 0.3 [28], we have 0.62 < γ < 1.34. There are other useful probes of modified gravity effects [49], but their detailed analysis is left for further studies.…”

Section: A Specific Example Escaping the Constraintsmentioning

confidence: 99%

Viable Palatini-f(R)cosmologies with generalized dark matter

Koivisto

2007

Phys. Rev. D

113

View full text Add to dashboard Cite

We study the formation of large-scale structure in universes dominated by dark matter and driven to accelerated expansion by f(R) gravity in the Palatini formalism. If the dark matter is cold, practically all of these models are ruled out because they fail to reproduce the observed matter power spectrum. We point out that if the assumption that dark matter is perfect and pressureless at all scales is relaxed, nontrivial alternatives to a cosmological constant become viable within this class of modified gravity models.

show abstract

Probing Gravity at Cosmological Scales by Measurements which Test the Relationship between Gravitational Lensing and Matter Overdensity

Cited by 407 publications

References 39 publications

Beyond the cosmological standard model

Beyond the cosmological standard model

Observational probes of cosmic acceleration

Viable Palatini-f(R)cosmologies with generalized dark matter

Contact Info

Product

Resources

About