RELICS: A Strong Lens Model for SPT-CLJ0615–5746, a z = 0.972 Cluster
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.
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 - .Attached Files
Published - Paterno-Mahler_2018_ApJ_863_154.pdf
Accepted Version - 1805.09834.pdf
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Additional details
- Eprint ID
- 88949
- Resolver ID
- CaltechAUTHORS:20180820-101756479
- NASA
- NAS 5-26555
- Created
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2018-08-20Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)