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

Niels Bohr Institutet - Afd.

108 Citationer (Scopus)

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%.

Originalsprog	Engelsk
Tidsskrift	Science
Vol/bind	329
Udgave nummer	5994
Sider (fra-til)	924-927
Antal sider	3
ISSN	0036-8075
DOI	https://doi.org/10.1126/science.1185759
Status	Udgivet - 20 aug. 2010

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10.1126/science.1185759

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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%.

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DO - 10.1126/science.1185759

M3 - Journal article

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Cosmological constraints from strong gravitational lensing in clusters of galaxies

Abstract

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