Cluster Strong Lensing at High Redshift

Details Cluster Strong Lensing at High Redshift Cluster Strong Lensing at High Redshift

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1767g&link_type=abstract

Chandra Proposal ID #06800198

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Chandra Proposal Id #06800198

Scientific paper

The Red-Sequence Cluster Survey has discovered a total of 8 strong lensing clusters, of which 3 show multiple arcs due to lensing of multiple background objects at various redshifts. All of these clusters are above z=0.64. The high multiplicity ratio, and the redshift distribution, is in clear contradiction to the latest cosmological arc predictions in the currently favored "concordance" cosmology. Understanding these high redshift lensing clusters is thus crucial, and will inform the study of clusters as a whole. Chandra, with its exquisite resolution, is the best tool for direct observation of possible causes for this lensing boost. In this proposal, we request a deep observation of the most distant and most massive RCS multiple arc cluster: RCS2319.9+0038 at z=0.905.

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