Cluster dipole analysis as a test of dark matter models.

Details Cluster dipole analysis as a test of dark matter models. Cluster dipole analysis as a test of dark matter models.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apl%26c..33...91b&link_type=abstract

Astrophysical Letters and Communications, Vol. 33, Nos. 1 - 5, p. 91 - 97

Astronomy and Astrophysics

Astrophysics

Clusters Of Galaxies: Dark Matter

Scientific paper

The aim of the author's analysis is to check to what extent the observed structure of the cluster dipole represents a constraint for DM models. The main results can be summarized as follows. Local Group like observers are likely produced in Ω0 = 1 models. Misalignment between the directions of the CMB and cluster dipoles like that observed occurs quite often, although an accurate alignment is not always guaranteed. The observed cluster dipole amplitude is more typical in the four high-density (Ω0 = 1) models than in the low-density (Ω0 = 0.2) ones. Independent estimates of the cluster biasing factor in the simulations allows to work out the value of Ω0 from cluster dipoles. It turns out that the input value (Ω0 = 1 or 0.2) is recovered quite well, thus supporting the reliability of cluster dipole to measure the average matter density in the Universe.

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