Cosmological Constraints from Strong Gravitational Lensing in Clusters of Galaxies-Reference-Cited by-同舟云学术

Cosmological Constraints from Strong Gravitational Lensing in Clusters of Galaxies

Published:2010-08-20 Issue:5994 Volume:329 Page:924-927
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Jullo Eric¹²,Natarajan Priyamvada³⁴,Kneib Jean-Paul²,D’Aloisio Anson⁴,Limousin Marceau²⁵,Richard Johan⁶,Schimd Carlo²

Affiliation:

1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

2. Laboratoire d’Astrophysique de Marseille, CNRS, Universite de Provence, 38 rue Frederic Joliot-Curie, 13388 Marseille Cedex 13, France.

3. Department of Astronomy, Yale University, Post Office Box 208101, New Haven, CT 06511–8101, USA.

4. Department of Physics, Yale University, Post Office Box 208120, New Haven, CT 06520–8120, USA.

5. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark.

6. Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK.

Abstract

Through a Lens Darkly According to recent measurements, 72% of the energy content in the universe is in the form of dark energy, a gravitationally repulsive constituent that is powering the accelerating expansion of the universe but whose nature is unknown. Now, Jullo et al. (p. 924 ) show how observations of systems of multiple images produced by the strong gravitational lensing effect of a single mass distribution can be used to constrain the properties of dark energy. Applied to the cluster Abel 1689—a galaxy cluster that is known for its lensing properties—and combined with the results of other techniques, this method brings down the overall error in the equation of state parameter of dark energy by 30%.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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