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Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2011

Dynamics of voids and their shapes in redshift space

Résumé

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.

Dates et versions

hal-00575893 , version 1 (11-03-2011)

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Citer

Kei-Ichi Maeda, Nobuyuki Sakai, Roland Triay. Dynamics of voids and their shapes in redshift space. Journal of Cosmology and Astroparticle Physics, 2011, 08, pp.026. ⟨10.1088/1475-7516/2011/08/026⟩. ⟨hal-00575893⟩
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