Tests of general relativity on astrophysical scales

Uzan, Jean‐Philippe

doi:10.1007/s10714-010-1047-8

Cited by 50 publications

(41 citation statements)

References 165 publications

(216 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That would affect the rate of expansion of the universe and hence BBN (see [64] and Ref. [63] for a review). Coupled variation of the fundamental couplings is also motivated by superstring theories (see Ref.…”

Section: Resultsmentioning

confidence: 99%

Primordial Nucleosynthesis

Coc¹

2013

Acta Phys. Pol. B

View full text Add to dashboard Cite

Abstract. Primordial nucleosynthesis, or Big Bang Nucleosynthesis (BBN), is one of the three evidences for the Big-Bang model, together with the expansion of the Universe and the Cosmic Microwave Background. There is a good global agreement over a range of nine orders of magnitude between abundances of 4 He, D, 3 He and 7 Li deduced from observations, and calculated in primordial nucleosynthesis. This comparison was used to determine the baryonic density of the Universe. For this purpose, it is now superseded by the analysis of the Cosmic Microwave Background (CMB) radiation anisotropies. However, there remain, a yet unexplained, discrepancy of a factor 3-5, between the calculated and observed lithium primordial abundances, that has not been reduced, neither by recent nuclear physics experiments, nor by new observations. We review here the nuclear physics aspects of BBN for the production of 4 He, D, 3 He and 7 Li, but also 6 Li, 9 Be, 11 B and up to CNO isotopes. These are, for instance, important for the initial composition of the matter at the origin of the first stars. Big-Bang nucleosynthesis, that has been used, to first constrain the baryonic density, and the number of neutrino families, remains, a valuable tool to probe the physics of the early Universe, like variation of "constants" or alternative theories of gravity.

show abstract

Section: Resultsmentioning

confidence: 99%

Primordial Nucleosynthesis

Coc¹

2013

Acta Phys. Pol. B

View full text Add to dashboard Cite

show abstract

“…Among these tests, it has been shown that general relativity can be tested by using observations of the large-scale structure of the universe [1,6], as first proposed by Uzan & Bernardeau [7] ten years ago or by studying the fundamental constants [8][9][10][11]. We shall discuss them below.…”

Section: (B) Checking the Hypothesesmentioning

confidence: 99%

“…For the same reason that, in the case of a general relativity modification, at the background level P de and r de can depend on H , the quantities S de , D de and P de can depend on F and J, while F is a function of the background quantities only. Several similar approaches have since been designed in the literature to reproduce this formalism (changing its notations) and I refer to the recent review [1] (and in particular its §4.2.2) for their relation to my original formulation. In particular, most of these works propose interesting parametrizations of the unknown function introduced here in order to constrain them with cosmological data.…”

Section: Ii) Towards a Post-lcdm Parametrizationmentioning

confidence: 99%

Testing general relativity: from local to cosmological scales

Uzan

2011

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…We can expect a dramatic increase in the number of SNe Ia ⋆ E-mail: wang@ipac.caltech.edu 1 For recent reviews, see Ratra & Vogeley (2008) ;Frieman, Turner, & Huterer (2008) ;Caldwell & Kamionkowski (2009); Uzan (2010); Wang (2010); Li et al (2011); Weinberg et al (2013). that can be used to measure cosmic expansion history in the coming years and decades. Thousands of SNe Ia are expected from the Dark Energy Survey (DES) (Bernstein et al 2012), and hundreds of thousands of SNe Ia are expected from Large Synoptic Survey Telescope (LSST) (Abell et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Analytic photometric redshift estimator for Type Ia supernovae from the Large Synoptic Survey Telescope

Wang

Gjergo

Kuhlmann

2015

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Accurate and precise photometric redshifts (photo-z's) of Type Ia supernovae (SNe Ia) can enable the use of SNe Ia, measured only with photometry, to probe cosmology. This dramatically increases the science return of supernova surveys planned for the Large Synoptic Survey Telescope (LSST). In this paper we describe a significantly improved version of the simple analytic photo-z estimator proposed by Wang (2007) and further developed by Wang, Narayan, and Wood-Vasey (2007). We apply it to 55,422 simulated SNe Ia generated using the SNANA package with the LSST filters. We find that the estimated errors on the photo-z's, σ z phot /(1 + z phot ), can be used as filters to produce a set of photoz's that have high precision, accuracy, and purity. Using SN Ia colors as well as SN Ia peak magnitude in the i band, we obtain a set of photo-z's with 2 percent accuracy (with σ(z phot −z spec )/(1+z spec ) = 0.02), a bias in z phot (the mean of z phot −z spec ) of −9×10 −5 , and an outlier fraction (with |(z phot − z spec )/(1 + z spec )| > 0.1) of 0.23 percent, with the requirement that σ z phot /(1 + z phot ) < 0.01. Using the SN Ia colors only, we obtain a set of photo-z's with similar quality by requiring that σ z phot /(1 + z phot ) < 0.007; this leads to a set of photo-z's with 2 percent accuracy, a bias in z phot of 5.9 × 10 −4 , and an outlier fraction of 0.32 percent.

show abstract

Tests of general relativity on astrophysical scales

Cited by 50 publications

References 165 publications

Primordial Nucleosynthesis

Primordial Nucleosynthesis

Testing general relativity: from local to cosmological scales

Analytic photometric redshift estimator for Type Ia supernovae from the Large Synoptic Survey Telescope

Contact Info

Product

Resources

About