Mathematics – Logic
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996achph..69..373s&link_type=abstract
Helvetica Physica Acta, Vol. 69, No. 4, p. 373 - 387
Mathematics
Logic
1
Dark Matter: Gravitational Lenses, Clusters Of Galaxies: Mass Distribution
Scientific paper
The distortion of images of faint high-redshift galaxies by the tidal gravitational field of mass concentrations allows to investigate the mass distribution of individual galaxy clusters, the investigation of the statistical properties of the mass distribution in galaxy halos, and the detection of dark halos without any reference to their luminosity. In addition, the statistical properties of the image distortion field on large scales can be used to infer directly the power spectrum of cosmological density fluctuations. The author outlines the basic methods of this new research field in extragalactic astrophysics, and presents several recent results; in particular, a high-resolution mass map of a high-redshift cluster of galaxies is presented and compared to the light distribution.
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