Gravitational lens magnification and galaxy cluster masses

Details Gravitational lens magnification and galaxy cluster masses Gravitational lens magnification and galaxy cluster masses

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999elss.conf..226t&link_type=abstract

"Evolution of large scale structure : from recombination to Garching /edited by A. J. Banday, R. K. Sheth, L. N. da Costa. Garch

Physics

Scientific paper

The absolute mass of a cluster can be measured by the gravitational lens magnification of a background galaxy population. We have made the first application of this method to measure mass in the cluster Abell 1689, taking into account the uncertainties introduced by intrinsic clustering of the background galaxies, shot--noise,and the effects of strong magnification near the cluster center. We present mass maps and the mass profile. In a cylinder of radius 0.24 h-1 Mpc (2'.2) around the peak, we find the projected mass is M2d(<0.24 h-1 Mpc) =(0.50 ± 0.09) × 1015 h-1 M&sun;. Our results are in good agreement with those from the shear analysis.

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