Cosmological constraints from strong gravitational lensing in clusters of galaxies

Eric Jullo; P. Natarajan; J. P. Kneib; A. D'Alisio; Marceau Karim Emile Limousin; J. Richard; C. Schimd

doi:10.1126/science.1185759

Cosmological constraints from strong gravitational lensing in clusters of galaxies

Eric Jullo, P. Natarajan, J. P. Kneib, A. D'Alisio, Marceau Karim Emile Limousin, J. Richard, C. Schimd

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Abstract

Current efforts in observational cosmology are focused on characterizing the mass-energy content of the universe. We present results from a geometric test based on strong lensing in galaxy clusters. Based on Hubble Space Telescope images and extensive ground-based spectroscopic follow-up of the massive galaxy cluster Abell 1689, we used a parametric model to simultaneously constrain the cluster mass distribution and dark energy equation of state. Combining our cosmological constraints with those from x-ray clusters and the Wilkinson Microwave Anisotropy Probe 5-year data gives Ω_m = 0.25 ±0.05 and W_x = -0.97 ±0.07, which are consistent with results from other methods. Inclusion of our method with all other available techniques brings down the current 2σ contours on the dark energy equation-of-state parameter w_x by ∼30%.

Original language	English
Journal	Science
Volume	329
Issue number	5994
Pages (from-to)	924-927
Number of pages	3
ISSN	0036-8075
DOIs	https://doi.org/10.1126/science.1185759
Publication status	Published - 20 Aug 2010

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title = "Cosmological constraints from strong gravitational lensing in clusters of galaxies",

abstract = "Current efforts in observational cosmology are focused on characterizing the mass-energy content of the universe. We present results from a geometric test based on strong lensing in galaxy clusters. Based on Hubble Space Telescope images and extensive ground-based spectroscopic follow-up of the massive galaxy cluster Abell 1689, we used a parametric model to simultaneously constrain the cluster mass distribution and dark energy equation of state. Combining our cosmological constraints with those from x-ray clusters and the Wilkinson Microwave Anisotropy Probe 5-year data gives Ωm = 0.25 ±0.05 and Wx = -0.97 ±0.07, which are consistent with results from other methods. Inclusion of our method with all other available techniques brings down the current 2σ contours on the dark energy equation-of-state parameter wx by ∼30%.",

author = "Eric Jullo and P. Natarajan and Kneib, {J. P.} and A. D'Alisio and Limousin, {Marceau Karim Emile} and J. Richard and C. Schimd",

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T1 - Cosmological constraints from strong gravitational lensing in clusters of galaxies

AU - Jullo, Eric

AU - Natarajan, P.

AU - Kneib, J. P.

AU - D'Alisio, A.

AU - Limousin, Marceau Karim Emile

AU - Richard, J.

AU - Schimd, C.

PY - 2010/8/20

Y1 - 2010/8/20

N2 - Current efforts in observational cosmology are focused on characterizing the mass-energy content of the universe. We present results from a geometric test based on strong lensing in galaxy clusters. Based on Hubble Space Telescope images and extensive ground-based spectroscopic follow-up of the massive galaxy cluster Abell 1689, we used a parametric model to simultaneously constrain the cluster mass distribution and dark energy equation of state. Combining our cosmological constraints with those from x-ray clusters and the Wilkinson Microwave Anisotropy Probe 5-year data gives Ωm = 0.25 ±0.05 and Wx = -0.97 ±0.07, which are consistent with results from other methods. Inclusion of our method with all other available techniques brings down the current 2σ contours on the dark energy equation-of-state parameter wx by ∼30%.

AB - Current efforts in observational cosmology are focused on characterizing the mass-energy content of the universe. We present results from a geometric test based on strong lensing in galaxy clusters. Based on Hubble Space Telescope images and extensive ground-based spectroscopic follow-up of the massive galaxy cluster Abell 1689, we used a parametric model to simultaneously constrain the cluster mass distribution and dark energy equation of state. Combining our cosmological constraints with those from x-ray clusters and the Wilkinson Microwave Anisotropy Probe 5-year data gives Ωm = 0.25 ±0.05 and Wx = -0.97 ±0.07, which are consistent with results from other methods. Inclusion of our method with all other available techniques brings down the current 2σ contours on the dark energy equation-of-state parameter wx by ∼30%.

U2 - 10.1126/science.1185759

DO - 10.1126/science.1185759

M3 - Journal article

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VL - 329

SP - 924

EP - 927

JO - Science

JF - Science

IS - 5994

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Cosmological constraints from strong gravitational lensing in clusters of galaxies

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