Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21332202d&link_type=abstract
American Astronomical Society, AAS Meeting #213, #322.02; Bulletin of the American Astronomical Society, Vol. 41, p.377
Astronomy and Astrophysics
Astronomy
Scientific paper
Clusters exhibit a range of different lensing effects. There are strong lensing effects close to the core where multiple images and highly distorted arcs are formed. Close to the edges there is the weak distortion of background galaxy ellipticities. Since all the effects are produced by the same lensing potential we should be able to combine all of them. These different lensing observables have a different signal to noise ratio. Thus to combine them we have developed a technique "Particle Based Lensing" (PBL, pronounced as "pebble"). In this technique the smoothing scale can be varied spatially to accommodate the observables with different signal-to-noise ratio. Thus with an optimum smoothing scale and weighting scheme in PBL we have combined information from different observables to produce mass maps of clusters. We have applied this technique to several test cases to obtain excellent agreement with the input mass map.
Deb Sanghamitra
Goldberg David M.
Wilson Albert
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