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RELICS: A Strong Lens Model for SPT-CLJ0615–5746, a z = 0.972 Cluster

Paterno-Mahler, Rachel and Sendra-Server, Irene (2018) RELICS: A Strong Lens Model for SPT-CLJ0615–5746, a z = 0.972 Cluster. Astrophysical Journal, 863 (2). Art. No. 154. ISSN 1538-4357. https://resolver.caltech.edu/CaltechAUTHORS:20180820-101756479

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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 = 2.51^(+0.15)_(-0.09) x 10^(14) 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 ~ 10^(15) M☉). This cluster is lensing a previously reported z ~ 10 galaxy, which, if spectroscopically confirmed, will be the highest-redshift strongly lensed galaxy known.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/1538-4357/aad239DOIArticle
https://arxiv.org/abs/1805.09834arXivDiscussion Paper
ORCID:
AuthorORCID
Sendra-Server, Irene0000-0002-1148-8377
Additional Information:© 2018 The American Astronomical Society. Received 2018 May 24; revised 2018 July 4; accepted 2018 July 6; published 2018 August 20. We thank the referee for the helpful suggestions. Support for program GO14096 was provided 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 NAS 5-26555. This paper is based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with program GO14096. Archival data are associated with programs GO12757 and GO12477. This paper includes data gathered with the 6.5 meter Magellan Telescopes located at Las Campanas Observatory, Chile. Facilities: HST - Hubble Space Telescope satellite, Magellan - .
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASANAS 5-26555
Subject Keywords:clusters: individual (SPT-CLJ0615–5746) – gravitational lensing: strong
Issue or Number:2
Record Number:CaltechAUTHORS:20180820-101756479
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180820-101756479
Official Citation:Rachel Paterno-Mahler et al 2018 ApJ 863 154
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88949
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Aug 2018 21:28
Last Modified:09 Mar 2020 13:19

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