The Unique Cluster Lens SDSS1004+4112

Details The Unique Cluster Lens SDSS1004+4112 The Unique Cluster Lens SDSS1004+4112

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20277k&link_type=abstract

Spitzer Proposal ID #20277

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Scientific paper

SDSS1004+4112 is a unique example of a cluster lens because of its relatively high lens redshift (zlens=0.68), the existence of multiply imaged quasars for which time delays are measured, the presence of a significant number of multiply imaged background galaxies, and a quasar host galaxy that is so magnified that it can be observed in the mid-IR. By combining a deep 4-channel IRAC image with a NICMOS mosaic of the central, multiply-imaged region of the cluster, we will study the quasar host galaxy, search for low-mass substructure in the cluster, obtain accurate photometric redshifts for lensed arcs, discover very red lensed arcs and develop an accurate mass model for the cluster. Then we will combine all the data to obtain a competitive constraint on the cosmological model.

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