RELICS: High-resolution Constraints on the Inner Mass Distribution of the z = 0.83 Merging Cluster RXJ0152.7-1357 from Strong Lensing
Avila, Roberto J.
Czakon, Nicole G.
Dawson, William A.
Hoag, Austin T.
Johnson, Traci L.
Livermore, Rachael C.
Oesch, Pascal A.
Ryan, Russell E.
Stark, Daniel P.
AffiliationUniv Arizona, Steward Observ, Dept Astron
Keywordsgalaxies: clusters: individual (RXJ0152.7-1357, CL0152.7-1357)
gravitational lensing: strong
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PublisherIOP PUBLISHING LTD
CitationAna Acebron et al 2019 ApJ 874 132
Rights© 2019. The American Astronomical Society. All rights reserved.
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AbstractStrong 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 similar to 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 similar to 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.
VersionFinal published version
SponsorsRELICS Treasury Program [GO-14096]; NASA through the Space Telescope Science Institute [GO-14096]; NASA [NAS5-26555]; U.S. Department of Energy [DE-AC52-07NA27344]; Ministry of Science and Technology of Taiwan [MOST 106-2628-M-001-003-MY3]; Australian Research Council Discovery Early Career Researcher Award [DE180101240]; Australian Research Council Centre of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO-3D); ERC Consolidator Grant funding scheme (project ConTExt) ; Danish National Research Foundation