RELICS: High-resolution Constraints on the Inner Mass Distribution of the z = 0.83 Merging Cluster RXJ0152.7-1357 from Strong Lensing

Ana Acebron, May Alon, Adi Zitrin, Guillaume Mahler, Dan Coe, Keren Sharon, Nathália Cibirka, Maruša Bradač, Michele Trenti, Keiichi Umetsu, Felipe Andrade-Santos, Roberto J. Avila, Larry Bradley, Daniela Carrasco, Catherine Cerny, Nicole G. Czakon, William A. Dawson, Brenda Frye, Austin T. Hoag, Kuang Han HuangTraci L. Johnson, Christine Jones, Shotaro Kikuchihara, Daniel Lam, Rachael C. Livermore, Lorenzo Lovisari, Ramesh Mainali, Pascal A. Oesch, Sara Ogaz, Masami Ouchi, Matthew Past, Rachel Paterno-Mahler, Avery Peterson, Russell E. Ryan, Brett Salmon, Irene Sendra-Server, Daniel P. Stark, Victoria Strait, Sune Toft, Benedetta Vulcani

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Strong gravitational lensing (SL) is a powerful means of mapping the distribution of dark matter. In this work, we perform an SL analysis of the prominent X-ray cluster RXJ0152.7-1357 (z = 0.83, also known as CL0152.7-1357) in Hubble Space Telescope images, taken in the framework of the Reionization Lensing Cluster Survey (RELICS). On top of a previously known z = 3.93 galaxy multiply imaged by RXJ0152.7-1357, for which we identify an additional multiple image, guided by a light-traces-mass approach, we identify seven new sets of multiply imaged background sources lensed by this cluster, spanning the redshift range [1.79-3.93]. A total of 25 multiple images are seen over a small area of ∼0.4 arcmin 2 , allowing us to put relatively high-resolution constraints on the inner matter distribution. Although modestly massive, the high degree of substructure, together with its very elongated shape, makes RXJ0152.7-1357 a very efficient lens for its size. This cluster also comprises the third-largest sample of z ∼ 6-7 candidates in the RELICS survey. Finally, we present a comparison of our resulting mass distribution and magnification estimates with those from a Lenstool model. These models are made publicly available through the Mikulski Archive for Space Telescopes.

Original languageEnglish (US)
Article number132
JournalAstrophysical Journal
Issue number2
StatePublished - Apr 1 2019


  • galaxies: clusters: individual (RXJ0152.7-1357, CL0152.7-1357)
  • galaxies: high-redshift
  • gravitational lensing: strong

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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