Bulk flows, shear, and the great attractor

Details Bulk flows, shear, and the great attractor Bulk flows, shear, and the great attractor

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..388k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 388-392. Research supported by NSERC and Canadian In

Statistics

Computation

16

Computational Astrophysics, Dark Matter, Elliptical Galaxies, Galactic Evolution, Strange Attractors, Astronomical Models, Power Spectra, Taylor Series

Scientific paper

The predictions of cold-dark-matter (CDM) cosmological models regarding the distance to the great attractor and galaxy formation in the early universe are evaluated by means of comparisons based on a statistical analysis of the elliptical galaxy sample of Dressler et al. (1987). The focus is on the ratio of bulk flow speed to velocity shear. It is found that all of the models yield a broad distribution of distances, with no evidence for an underprediction of large-scale power by the CDM theory. Any discrepancy between CDM models and observations is shown to lie in the normalization required rather than in the power-spectrum shape.

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