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- W2158814153 abstract "Context. To investigate peculiar large scale motions under a diffusive-stochastic fluid description. Aims. Our basic aims are to find the profile of the pairwise galaxy velocity distribution using the dynamical fluid equation and to constrain the profile with current observational data. Methods. We rewrite the fluid equation for the galaxy fluid using a coarse-grained approach. Then, we solve the equation to find the theoretical velocity probability distribution. Next, we study the mode correlations in the Fourier space and find the profile to be compared with current observational data. Results. The theoretical profile for the mode correlations is a Lorentzian, which is in good agreement with data. Also, our model allowed us to constrain, for the first time, the viscosity parameter of the cosmic fluid as ∼3.35 Mpc 2 Gyr −1 . Conclusions. We find evidence that galaxy peculiar motions can be described as a fluid under a linear diffusive-stochastic regime at scales larger than ∼5 h −1 Mpc." @default.
- W2158814153 created "2016-06-24" @default.
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- W2158814153 date "2006-04-01" @default.
- W2158814153 modified "2023-09-27" @default.
- W2158814153 title "Galaxy peculiar motions under a diffusive-stochastic regime" @default.
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- W2158814153 doi "https://doi.org/10.1051/0004-6361:20054531" @default.
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