Physics
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10876k&link_type=abstract
HST Proposal ID #10876. Cycle 15
Physics
Scientific paper
Strong Gravitational Lensing is an invaluable tool to constrain the absolute mass distribution of structures irrespective of their light distribution. Strong Lensing has successfully been applied to single galaxies lensing quasars into multiple images, and to massive clusters lensing background sources into giant arcs. More recently, the Sloan Lens ACS Survey also found numerous examples of isolated, yet massive ellipticals lensing background galaxies into Einstein rings. We have started the Strong Lensing Legacy Survey SL2S looking for strong lenses in the 170 sq. degree CFHT-Legacy Survey, using dedicated automated search procedures, optimized for detection of arcs and Einstein rings. Thanks to the unsurpassed combined depth, area and image quality of the CFHT-LS, we uncovered a new population of lenses: the intermediate mass halo and sub-halo lenses. This new population effectively bridges the gap between single galaxies and massive clusters. Here, we propose to obtain SNAPSHOT ACS images of the 50 first strong lens candidates with Einstein radii 2"
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