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The coherence length of the peculiar velocity field in the universe and the large-scale galaxy correlation data (1992)

Kashlinsky, A.

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Publication Date: 2011-08-24

Description: This study presents a method for obtaining the true rms peculiar flow in the universe on scales up to 100-120/h Mpc using APM data as an input assuming only that peculiar motions are caused by peculiar gravity. The comparison to the local (Great Attractor) flow is expected to give clear information on the density parameter, Omega, and the local bias parameter, b. The observed peculiar flows in the Great Attractor region are found to be in better agreement with the open (Omega = 0.1) universe in which light traces mass (b = 1) than with a flat (Omega = 1) universe unless the bias parameter is unrealistically large (b is not less than 4). Constraints on Omega from a comparison of the APM and PV samples are discussed.

Keywords: ASTROPHYSICS

Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 386; L37-L41

Format: text

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