Dynamics of voids and their shapes in redshift space

Keiichi Maeda, Nobuyuki Sakai, Roland Triay

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    We investigate the dynamics of a single spherical void embedded in a Friedmann-Lematre universe, and analyze the void shape in the redshift space. We find that the void in the redshift space appears as an ellipse shape elongated along the line of sight (i.e., an opposite deformation to the Kaiser effect). Applying this result to observed void candidates at the redshift z ∼ 1-2, it may provide us with a new method to evaluate the cosmological parameters, in particular the value of a cosmological constant.

    Original languageEnglish
    Article number026
    JournalJournal of Cosmology and Astroparticle Physics
    Volume2011
    Issue number8
    DOIs
    Publication statusPublished - 2011 Aug

    Fingerprint

    voids
    ellipses
    line of sight
    universe

    Keywords

    • cosmological parameters from LSS
    • cosmological perturbation theory
    • cosmological simulations
    • dark energy theory

    ASJC Scopus subject areas

    • Astronomy and Astrophysics

    Cite this

    Dynamics of voids and their shapes in redshift space. / Maeda, Keiichi; Sakai, Nobuyuki; Triay, Roland.

    In: Journal of Cosmology and Astroparticle Physics, Vol. 2011, No. 8, 026, 08.2011.

    Research output: Contribution to journalArticle

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