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Strong gravitational lensing and dynamical dark energy


Maccio, A V (2005). Strong gravitational lensing and dynamical dark energy. Monthly Notices of the Royal Astronomical Society, 361(4):1250-1256.

Abstract

We study the strong gravitational lensing properties of galaxy clusters obtained from N-body simulations with different kinds of dark energy (DE). We consider both dynamical DE, due to a scalar field self-interacting through Ratra—Peebles (RP) or supergravity (SUGRA) potentials, and DE with constant negative w=p/ρ=−1 (ΛCDM). We have 12 high-resolution lensing systems for each cosmological model with mass greater than 5.0 × 1014 h−1 M⊙. Using a ray shooting technique, we make a detailed analysis of the lensing properties of these clusters, paying particular attention to the number of arcs and their properties (magnification, length and width). We find that the number of giant arcs produced by galaxy clusters changes in a considerable way from ΛCDM models to dynamical dark energy models with an RP or SUGRA potential. These differences originate from the different epochs of cluster formation and from the non-linearity of the strong lensing effect. We suggest that strong lensing is one of the best tools to discriminate among different kinds of dark energy

Abstract

We study the strong gravitational lensing properties of galaxy clusters obtained from N-body simulations with different kinds of dark energy (DE). We consider both dynamical DE, due to a scalar field self-interacting through Ratra—Peebles (RP) or supergravity (SUGRA) potentials, and DE with constant negative w=p/ρ=−1 (ΛCDM). We have 12 high-resolution lensing systems for each cosmological model with mass greater than 5.0 × 1014 h−1 M⊙. Using a ray shooting technique, we make a detailed analysis of the lensing properties of these clusters, paying particular attention to the number of arcs and their properties (magnification, length and width). We find that the number of giant arcs produced by galaxy clusters changes in a considerable way from ΛCDM models to dynamical dark energy models with an RP or SUGRA potential. These differences originate from the different epochs of cluster formation and from the non-linearity of the strong lensing effect. We suggest that strong lensing is one of the best tools to discriminate among different kinds of dark energy

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:National licences > 142-005
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Astronomy and Astrophysics
Physical Sciences > Space and Planetary Science
Language:English
Date:21 August 2005
Deposited On:23 Oct 2018 14:22
Last Modified:31 Jul 2020 02:30
Publisher:Oxford University Press
ISSN:0035-8711
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1111/j.1365-2966.2005.09257.x
Related URLs:https://www.swissbib.ch/Search/Results?lookfor=nationallicenceoxford101111j13652966200509257x (Library Catalogue)

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