Cited by 67Cosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaDark Matter and Cosmic Phenomena

DISTANCE, GROWTH FACTOR, AND DARK ENERGY CONSTRAINTS FROM PHOTOMETRIC BARYON ACOUSTIC OSCILLATION AND WEAK LENSING MEASUREMENTS

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Zhan, Hu, Knox, Lloyd, Tyson, J. Anthony·2009·The Astrophysical Journal

Abstract

Baryon acoustic oscillations (BAOs) and weak lensing (WL) are complementary probes of cosmology. We explore the distance and growth factor measurements from photometric BAO and WL techniques, and investigate the roles of the distance and growth factor in constraining dark energy. We find for WL that the growth factor has a great impact on dark energy constraints, but is much less powerful than the distance. Dark energy constraints from WL are concentrated in considerably fewer distance eigenmodes than those from BAO, with the largest contributions from modes that are sensitive to the absolute distance. Both techniques have some well-determined distance eigenmodes that are not very sensitive to the dark energy equation-of-state parameters w 0 and w a , suggesting that they can accommodate additional parameters for dark energy and for the control of systematic uncertainties. A joint analysis of BAO and WL is far more powerful than either technique alone, and the resulting constraints on the distance and growth factor will be useful for distinguishing dark energy and modified gravity models. The Large Synoptic Survey Telescope (LSST) will yield both WL and angular BAO over a sample of several billion galaxies. Joint LSST BAO and WL can yield 0.5% level precision on ten comoving distances evenly spaced in log(1 + z ) between redshift 0.3 and 3 with cosmic microwave background priors from Planck . In addition, since the angular diameter distance, which directly affects the observables, is linked to the comoving distance solely by the curvature radius in the Friedmann–Robertson–Walker metric solution, the LSST can achieve a pure metric constraint of 0.017 on the mean curvature parameter Ω k of the universe simultaneously with the constraints on the comoving distances.

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Crossref · 10.1088/0004-637x/690/1/923

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  • SN anisotropy results can be compared with anisotropy measures from combined WL and LSS.

    “The results from this method can be compared with similar measures of anisotropy from the combination of WL and LSS ( Zhan et al. 2009 ) .”

    From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as Zhan et al. 2009

  • Cosmological analyses can be carried out using SN, WL, and LSS in subsets of LSST data in different sky regions, testing fundamental assumptions of homogeneity and isotropy.

    “Cosmological analyses can be carried out using SN, WL, and LSS in subsets of the LSST data in different regions of the sky, testing fundamental cosmological assumptions of homogeneity and isotropy ( e.g., Zhan et al. 2009 ) .”

    From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as Zhan et al. 2009

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Authors
Zhan, H., Knox, L., & Tyson, J. A.
Affiliations
University of California, Davis (US)
Corresponding author
Zhan, Hu
Venue
The Astrophysical Journal
Published
2008-12-01
Volume
690
Issue
1
Pages
923-936
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W2048775973
Cited by
67
References
98
Citations by year
2024: 2 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 4 · 2017: 4 · 2016: 7 · 2015: 3 · 2014: 1 · 2013: 4 · 2012: 12
FWCI
4.08
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
Keywords
baryon acoustic oscillations, weak gravitational lensing, dark energy, growth factors, comoving distance, dark energy equation of state, modified gravity, angular diameter distance, spatial curvature, LSST

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