Rethinking lensing and Λ

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume575
Issue number1 II
DOIs
StatePublished - Aug 10 2002

Fingerprint

lenses
statistics
galaxies
cosmology
sensitivity

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmological parameters
  • Galaxies: evolution
  • Gravitational lensing

Cite this

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title = "Rethinking lensing and Λ",
abstract = "Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.",
keywords = "Cosmological parameters, Galaxies: evolution, Gravitational lensing",
author = "Charles Keeton",
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language = "English (US)",
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Rethinking lensing and Λ. / Keeton, Charles.

In: Astrophysical Journal, Vol. 575, No. 1 II, 10.08.2002.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rethinking lensing and Λ

AU - Keeton, Charles

PY - 2002/8/10

Y1 - 2002/8/10

N2 - Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.

AB - Strong gravitational lensing has traditionally been one of the few phenomena said to oppose a large cosmological constant; many analyses of lens statistics have given upper limits on ΩΛ that are marginally inconsistent with the concordance cosmology. Those conclusions were based on models in which the predicted number counts of galaxies at moderate redshifts (z ∼ 0.5-1) increased significantly with Ω Λ. I argue that the models should now be calibrated by counts of distant galaxies. When this is done, lens statistics lose most of their sensitivity to the cosmological constant.

KW - Cosmological parameters

KW - Galaxies: evolution

KW - Gravitational lensing

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U2 - 10.1086/342558

DO - 10.1086/342558

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VL - 575

JO - Astrophysical Journal

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