The Mass Distribution of the Strong Lensing Cluster SDSS J1531+3414
Rigby, Jane R.; Sharon, Keren; Johnson, Traci L.; Dahle, Håkon; Bayliss, Matthew B.; Florian, Michael K.; Gladders, Michael D.; Wuyts, Eva
United States, Germany, Norway
Abstract
We present the mass distribution at the core of SDSS J1531+3414, a strong-lensing cluster at z = 0.335. We find that the mass distribution is well described by two cluster-scale halos with a contribution from cluster-member galaxies. New Hubble Space Telescope observations of SDSS J1531+3414 reveal a signature of ongoing star formation associated with the two central galaxies at the core of the cluster, in the form of a chain of star forming regions at the center of the cluster. Using the lens model presented here, we place upper limits on the contribution of a possible lensed image to the flux at the central region, and rule out that this emission is coming from a background source.
Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with program GO-13003.