The Cluster Lensing And Supernova survey with Hubble (CLASH): Weak Lensing from Subaru Observations

Details The Cluster Lensing And Supernova survey with Hubble (CLASH): Weak Lensing from Subaru Observations The Cluster Lensing And Supernova survey with Hubble (CLASH): Weak Lensing from Subaru Observations

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933824m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #338.24

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The Cluster Lensing And Supernova survey with Hubble (CLASH) is a 524-orbit multi-cycle treasury program to observe 25 galaxy clusters each in 16 broadband filters with WFC3 and ACS. One of the most important drivers of this program is to accurately map the mass distributions of these clusters and to interpret their cosmological implications. Gravitational lensing provides a direct probe of the total mass, regardless of its physical state or composition. A combination of strong lensing (SL) analysis in cluster centers, with weak lensing (WL) analysis that trace the cluster mass out to the virial radius, is required in order to measure cluster mass and its distribution on all scales.
Our wide-field analysis of CLASH clusters utilizes complementary multi-band ground-based Subaru/Suprime-Cam photometry, ideal for WL measurements. By using 5-band photometry we reliably separate the background galaxies for a dilution-free WL measurement, and derive representative 1D/2D mass reconstructions out to the virial radius and robustly measure the cluster dark matter concentrations for several clusters. The full set of 25 clusters will provide unprecedented insights into the mechanisms of structure formation on cluster scale and a test of cosmological models.

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