2005/07/14 by Keren Sharon, Eran O. Ofek, Graham P. Smith +8 · 4 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Center (category theory) #Cluster (spacecraft) #Einstein ring #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Gamma-ray bursts and supernovae #Hubble space telescope #Quasar #RADIUS #Redshift #astro-ph
paper · pdf · doi:10.1086/452633
published as Astrophys.J.629:L73-L76,2005 · 5 pages, 3 figures. Accepted by ApJL. High resolution version of the paper can be found at: http://wise-obs.tau.ac.il/~kerens/papers.html
arxiv created 2005/07/14 · openalex publication_date 2005/08/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have identified three multiply imaged galaxies in Hubble Space Telescope images of the redshift z = 0.68 cluster responsible for the large-separation quadruply lensed quasar, SDSS J1004+4112. Spectroscopic redshifts have been secured for two of these systems using the Keck I 10 m telescope. The most distant lensed galaxy, at z = 3.332, forms at least four images, and an Einstein ring encompassing 3.1 times more area than the Einstein ring of the lensed QSO images at z = 1.74, due to the greater source distance. For a second multiply imaged galaxy, we identify Lyα emission at a redshift of z = 2.74. The cluster mass profile can be constrained from near the center of the brightest cluster galaxy, where we observe both a radial arc and the fifth image of the lensed quasar, to the Einstein radius of the highest redshift galaxy, ~110 kpc. Our preliminary modeling indicates that the mass approximates an elliptical body, with an average projected logarithmic gradient of ≃-0.5. The system is potentially useful for a direct measurement of world models in a previously untested redshift range.