Rethinking lensing and Λ

Charles R. Keeton

doi:10.1086/342558

Rethinking lensing and Λ

Charles R. Keeton

School of Arts and Sciences

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

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 Ω_Λ 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 language	English (US)
Pages (from-to)	L1-L4
Journal	Astrophysical Journal
Volume	575
Issue number	1 II
DOIs	https://doi.org/10.1086/342558
State	Published - Aug 10 2002

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmological parameters
Galaxies: evolution
Gravitational lensing

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10.1086/342558

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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 = "Keeton, {Charles R.}",

note = "Funding Information: I am very grateful to the referee, David Rusin, for important criticisms and insightful comments. I also thank Huan Lin for interesting discussions and Wayne Hu for comments on the manuscript. This work was supported by NASA through Hubble Fellowship grant HST-HF-01141.01-A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.",

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N1 - Funding Information: I am very grateful to the referee, David Rusin, for important criticisms and insightful comments. I also thank Huan Lin for interesting discussions and Wayne Hu for comments on the manuscript. This work was supported by NASA through Hubble Fellowship grant HST-HF-01141.01-A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

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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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Rethinking lensing and Λ

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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