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

Abstract

In this work, 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 = 267 (the region where the strong lensing constraints exist) to be M_⊙. If we extrapolate out to r₅₀₀, our projected mass density is consistent with the mass inferred from weak lensing and from the Sunyaev–Zel'dovich effect (M ~ 10¹⁵ M_⊙). This cluster is lensing a previously reported z ~ 10 galaxy, which, if spectroscopically confirmed, will be the highest-redshift strongly lensed galaxy known.

Authors:

Paterno-Mahler, Rachel  ^[1];

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• Search DOE PAGES for ORCID "0000-0003-3653-3741"

Sharon, Keren  ^[2];

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• Search DOE PAGES for ORCID "0000-0002-7559-0864"

Coe, Dan  ^[3];

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• Search DOE PAGES for ORCID "0000-0001-7410-7669"

Mahler, Guillaume ^[2]; Cerny, Catherine ^[4]; Johnson, Traci L.  ^[2];

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• Search DOE PAGES for ORCID "0000-0002-8829-5303"

Schrabback, Tim ^[5]; Andrade-Santos, Felipe  ^[6];

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• Search DOE PAGES for ORCID "0000-0002-8144-9285"

Avila, Roberto J. ^[3]; Bradač, Maruša  ^[7];

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• Search DOE PAGES for ORCID "0000-0001-5984-0395"

Bradley, Larry D.  ^[3];

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• Search DOE PAGES for ORCID "0000-0002-7908-9284"

Carrasco, Daniela  ^[8];

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Czakon, Nicole G. ^[9]; Dawson, William A.  ^[10];

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• Search DOE PAGES for ORCID "0000-0003-0248-6123"

Frye, Brenda L. ^[11]; Hoag, Austin T.  ^[7];

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Huang, Kuang-Han  ^[7];

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• Search DOE PAGES for ORCID "0000-0001-7826-6448"

Jones, Christine ^[6]; Lam, Daniel ^[12]; Livermore, Rachael  ^[13]

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more »; Lovisari, Lorenzo ^[6]; Mainali, Ramesh  ^[11];

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Oesch, Pascal A.  ^[14];

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Ogaz, Sara ^[3]; Past, Matthew ^[2]; Peterson, Avery ^[2]; Ryan, Russell E. ^[3]; Salmon, Brett  ^[3];

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Sendra-Server, Irene ^[15]; Stark, Daniel P. ^[11]; Umetsu, Keiichi  ^[16];

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Vulcani, Benedetta  ^[8];

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Zitrin, Adi  ^[17]

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• Search DOE PAGES for ORCID "0000-0002-0350-4488"

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+ Show Author Affiliations

1. Univ. of California, Irvine, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
2. Univ. of Michigan, Ann Arbor, MI (United States)
3. Space Telescope Science Inst., Baltimore, MD (United States)
4. Univ. of Michigan, Ann Arbor, MI (United States); Boston Univ., MA (United States). Inst. for Astrophysical Research
5. Univ. Bonn (Germany). Argelander-Inst. fur Astronomie
6. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
7. Univ. of California, Davis, CA (United States)
8. Univ. of Melbourne, VIC (Australia)
9. Academia Sinica, Taipei (Taiwan). Inst. of Astronomy and Astrophysics
10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
11. Univ. of Arizona, Tucson, AZ (United States). Steward Observatory
12. Leiden Univ. (Netherlands). Leiden Observatory
13. Univ. of Melbourne, VIC (Australia); ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), VIC (Australia)
14. Univ. of Geneva, Versoix (Switzerland)
15. California Institute of Technology (CalTech), Pasadena, CA (United States). Infrared Processing and Analysis Center
16. Academia Sinica Inst. of Astronomy and Astrophysics (ASIAA), Taipei (Taiwan)
17. Ben Gurion Univ. of the Negev, Beer Sheva (Israel)

Publication Date:

Mon Aug 20 00:00:00 EDT 2018

Research Org.:

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA)

OSTI Identifier:

1862748

Report Number(s):

LLNL-JRNL-831915
Journal ID: ISSN 1538-4357; 1049223; TRN: US2305547

Grant/Contract Number:  

AC52-07NA27344; NAS5-26555

Resource Type:

Accepted Manuscript

Journal Name:

The Astrophysical Journal (Online)

Additional Journal Information:

Journal Name: The Astrophysical Journal (Online); Journal Volume: 863; Journal Issue: 2; Journal ID: ISSN 1538-4357

Publisher:

IOP Publishing

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; clusters: individual (SPT-CLJ0615–5746); gravitational lensing: strong