Journal article

RELICS: Strong Lensing Analysis of the Galaxy Clusters Abell S295, Abell 697, MACS J0025.4-1222, and MACS J0159.8-0849

Nathalia Cibirka, Ana Acebron, Adi Zitrin, Dan Coe, Irene Agulli, Felipe Andrade-Santos, Marusa Bradac, Brenda Frye, Rachael C Livermore, Guillaume Mahler, Brett Salmon, Keren Sharon, Michele Trenti, Keiichi Umetsu, Roberto Avila, Larry Bradley, Daniela Carrasco, Catherine Cerny, Nicole G Czakon, William A Dawson Show all



We present a strong lensing analysis of four massive galaxy clusters imaged with the Hubble Space Telescope in the Reionization Lensing Cluster Survey. We use a light-traces-mass technique to uncover sets of multiple images and constrain the mass distribution of the clusters. These mass models are the first published for Abell S295 and MACS J0159.8-0849 and are improvements over previous models for Abell 697 and MACS J0025.4-1222. Our analysis for MACS J0025.4-1222 and Abell S295 shows a bimodal mass distribution supporting the merger scenarios proposed for these clusters. The updated model for MACS J0025.4-1222 suggests a substantially smaller critical area than previously estimated. For MA..

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University of Melbourne Researchers


Awarded by NASA

Awarded by U.S. Department of Energy

Awarded by Australian Research Council Discovery Early Career Researcher Award

Awarded by NASA/ESA HST

Awarded by NASA through Space Telescope Science Institute

Funding Acknowledgements

We would like to thank the reviewer of this work for useful comments. This work is based on observations taken by the RELICS Treasury Program (GO-14096) with the NASA/ESA HST. Program GO-14096 is supported by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work was performed in part under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. RCL acknowledges support from an Australian Research Council Discovery Early Career Researcher Award (DE180101240). Based in part on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina), and Ministerio da Ciencia, Tecnologia e Inovacao (Brazil). Data were retrieved through the Gemini Observatory Archive and processed using the Gemini IRAF package. We thank Michael Lundquist for very useful help with the Gemini data reduction.