On the reliability of Virgo infall in estimating the mass density of the universe

Details On the reliability of Virgo infall in estimating the mass density of the universe On the reliability of Virgo infall in estimating the mass density of the universe

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217p...7b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Nov. 1, 1985, p. 7P-11P.

Statistics

Computation

20

Local Group (Astronomy), Mass Distribution, Space Density, Universe, Virgo Galactic Cluster, Computational Astrophysics, Neutrinos, Velocity Distribution

Scientific paper

The infall velocities of particles in matter-dominated gravitational Universe simulations with the density parameter Ω = 1 are studied in an effort to determine the reliability of estimating Ω from infall to clusters. It is shown that such methods often err by a factor of 2 or more, even when light faithfully traces mass. Furthermore, the value Ω = 0 is often within one standard deviation in an Ω = 1 Universe model.

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