Dynamics of Void and its Shape in Redshift Space

Abstract

We investigate the dynamics of a single spherical void embedded in a Friedmann-Lemaître 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 in the direction of 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.

19 pages, 11 figures

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Cited by in corpus (7)

• A first application of the Alcock-Paczynski test to stacked cosmic voids
• Impact of local structure on the cosmic radio dipole
• On de-Sitter Geometry in Cosmic Void Statistics
• Non-comoving baryons and cold dark matter in cosmic voids
• Gas accretion and Ram Pressure Stripping of Haloes in Void Walls
• Energy conditions for non-timelike thin shells
• Motion of the Local Group as a cosmological probe