Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apri16005s&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Gravitational lensing offers a unique opportunity to probe the distribution of dark matter in the universe. Determining the gravitational behavior of dark matter in galaxy clusters is important because galaxy clusters are believed to be representative samples of the composition of the universe. In this presentation I will discuss how the total mass of a cluster (luminous and dark) can be mapped using gravitational lensing in the weak lensing regime. In particular, I will present the weak lensing map of the galaxy cluster Abell 781, and discuss how making strategic 'color cuts', which identify foreground objects and exclude them from analysis, can improve the lensing signal and hence the accuracy of the weak lensing map.
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