Year: 2018
Type: article
Abstract: We 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 ∼ 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 ☉. 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 ∼ 1015 M ☉). This cluster is lensing a previously reported z ∼ 10 galaxy, which, if spectroscopically confirmed, will be the highest-redshift strongly lensed galaxy known.
Source: The Astrophysical Journal
Authors: Rachel Paterno-Mahler, Keren Sharon, Dan Coe, Guillaume Mahler, Catherine Cerny, Traci L. Johnson, Tim Schrabback, Felipe Andrade-Santos, Roberto J. Avila, Maruša Bradač, Larry D. Bradley, Daniela Carrasco, Nicole G. Czakon, William A. Dawson, Brenda L. Frye, Austin T. Hoag, Kuang-Han Huang, Christine Jones, Daniel Lam, Rachael Livermore, Lorenzo Lovisari, Ramesh Mainali, Pascal A. Oesch, Sara Ogaz, Matthew Past, Avery Peterson, Russell E. Ryan, Brett Salmon, Irene Sendra-Server, Daniel P. Stark, Keiichi Umetsu, Benedetta Vulcani, Adi Zitrin
Institutions: University of California, Irvine, University of Michigan, Space Telescope Science Institute, Boston University, University of Bonn, Center for Astrophysics Harvard & Smithsonian, University of California, Davis, The University of Melbourne, Institute of Astronomy and Astrophysics, Academia Sinica, Academia Sinica, Lawrence Livermore National Laboratory, University of Arizona, Leiden University, Leiden Observatory, ASTRO-3D, ARC Centre of Excellence for All-sky Astrophysics, University of Geneva, California Institute of Technology, Infrared Processing and Analysis Center, Ben-Gurion University of the Negev
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2804976517