Strong gravitational lensing and dynamical dark energy

Andrea Maccio

    Research output: Contribution to journalArticle

    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 (ACDM). 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 ACDM 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.

    Original languageEnglish (US)
    Pages (from-to)1250-1256
    Number of pages7
    JournalMonthly Notices of the Royal Astronomical Society
    Volume361
    Issue number4
    DOIs
    StatePublished - Aug 21 2005

    Fingerprint

    dark energy
    energy
    supergravity
    arcs
    galaxies
    magnification
    nonlinearity
    rays
    potential energy
    time measurement
    scalars
    high resolution
    simulation

    Keywords

    • Cosmology: theory
    • Dark matter
    • Galaxies: clusters: general
    • Galaxies: haloes
    • Methods: analytical
    • Methods: numerical

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Strong gravitational lensing and dynamical dark energy. / Maccio, Andrea.

    In: Monthly Notices of the Royal Astronomical Society, Vol. 361, No. 4, 21.08.2005, p. 1250-1256.

    Research output: Contribution to journalArticle

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