The local mean mass density of the universe - New methods for studying galaxy clustering

Details The local mean mass density of the universe - New methods for studying galaxy clustering The local mean mass density of the universe - New methods for studying galaxy clustering

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221....1d&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, Apr. 1, 1978, p. 1-18.

Astronomy and Astrophysics

Astrophysics

84

Cosmology, Galactic Clusters, Mass Distribution, Red Shift, Spatial Distribution, Correlation, Galactic Evolution, Luminosity, Luminous Intensity, Universe, Velocity Distribution

Scientific paper

Methods for analyzing redshift catalogs are presented and demonstrated by examining the constraints which currently available data place on the ratio (OmegaG) of the local mean mass density associated with galaxies to the critical density for an Einstein-de Sitter universe. Methods are outlined which are used to estimate OmegaG from a data set that includes nearly complete redshift information for galaxies brighter than a limiting blue magnitude of 13.0. The mean luminosity density is reevaluated and found to be consistent with the result of Gott and Turner (1976) but smaller than the result obtained by Shapiro (1971). Techniques for applying the virial theorem to estimate OmegaG are discussed, two redshift-weighted estimators are computed for the two-point spatial correlation function, and an estimate of the amplitude of that function in a specific power-law model is derived which is almost a factor of 2 smaller than previous estimates. The one-dimensional rms relative peculiar velocity dispersion is estimated to be 300 + or - 30 km/s, practically independent of physical separation. The statistical virial theorems are shown to suggest a value of 0.2 to approximately 0.7 for Omega sub G.

Affiliated with

Also associated with

No associations

Rating

The local mean mass density of the universe - New methods for studying galaxy clustering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The local mean mass density of the universe - New methods for studying galaxy clustering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The local mean mass density of the universe - New methods for studying galaxy clustering will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1379057