RELICS: A Strong Lens Model for SPT-CLJ0615-5746, a z=0.972 Cluster
Johnson, Traci L.
Avila, Roberto J.
Bradley, Larry D.
Czakon, Nicole G.
Dawson, William A.
Frye, Brenda L.
Hoag, Austin T.
Oesch, Pascal A.
Ryan, Russell E.
Stark, Daniel P.
AffiliationUniv Arizona, Steward Observ
Univ Arizona, Dept Astron
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationRachel Paterno-Mahler et al 2018 ApJ 863 154
Rights© 2018. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractWe present a lens model for the cluster SPT-CLJ0615-5746, which is the highest-redshift (z = 0.972) system in the Reionization of Lensing Clusters Survey, making it the highest-redshift cluster for which a full, strong lens model is published. We identify three systems of multiply imaged lensed galaxies, two of which we spectroscopically confirm at z = 1.358 and z = 4.013, which we use as constraints for the model. We find a foreground structure at z similar to 0.4, which we include as a second cluster-sized halo in one of our models; however, two different statistical tests find the best-fit model consists of one cluster-sized halo combined with three individually optimized galaxy-sized halos, as well as contributions from the cluster galaxies themselves. We find the total projected mass density within r = 26.'' 7 (the region where the strong lensing constraints exist) to be M = 2.51(-0.09)(+0.15) x 10(14) M-circle dot. If we extrapolate out to r(500), our projected mass density is consistent with the mass inferred from weak lensing and from the Sunyaev-Zel'dovich effect (M similar to 10(15)M(circle dot)). This cluster is lensing a previously reported z similar to 10 galaxy, which, if spectroscopically confirmed, will be the highest-redshift strongly lensed galaxy known.
VersionFinal published version
SponsorsNASA through a grant from the Space Telescope Science Institute [GO14096]; NASA [NAS 5-26555]; [GO12757]; [GO12477]