Abstract
We compute the expected number of quasars multiply imaged by cluster-size dark halos for current wide-field quasar surveys by carrying out a large ensemble of ray-tracing simulations through clusters from a cosmological N-body simulation of the ΛCDM cosmology, with power spectrum normalization σ8 = 0.95. Our calculation predicts ~4 quasar lenses with splittings θ > 10'' in the SDSS spectroscopic quasar sample, consistent with the recent discovery of the wide separation lens SDSS J1004+4112, which has θ = 14.6''. The SDSS faint photometric quasar survey will contain ~12 multiply imaged quasars with splittings θ > 10''. Of these, ~2 will be lenses with θ > 30'', and ~2 will be at high redshift (zs ~ 4).
Export citation and abstract BibTeX RIS