Dynamics of voids and their shapes in redshift space

Kei Ichi Maeda*, Nobuyuki Sakai, Roland Triay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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
Issue number8
Publication statusPublished - 2011 Aug


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

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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