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Galaxy Velocity Field in Tilted Cold Dark Matter Models

F. Lucchin·S. Matarrese·L. Moscardini·G. Tormen
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Abstract

We study the cosmic peculiar velocity field as traced by a sample of 1184 spiral, elliptical and S0 galaxies, grouped in 704 objects. We carry out a statistical analysis, by calculating bulk flows and velocity correlation functions for this sample and for mock catalogs which we extract from N--body simulations. For the simulations we consider tilted (i.e. with spectral index $n\leq 1$) CDM models with different values of the linear bias parameter $b$. By mean of a maximum likelihood analysis we estimate the ability of the models in fitting the observations as measured by the above statistics and in reproducing the Local Group properties.

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F. Lucchin, S. Matarrese, L. Moscardini, G. Tormen. 1993-09-27. Galaxy Velocity Field in Tilted Cold Dark Matter Models. https://arxiv.org/abs/astro-ph/9309039

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