HST strong-lensing model for the first JWST galaxy cluster SMACS J0723.3-7327

Abstract

On 2022 July 8, NASA shared${}^a$ the list of five public showcase targets which have been observed with the new \textit{James Webb Space Telescope} (JWST), and whose data are expected to be released to the public around Tuesday, July 12. One of these targets is the galaxy cluster SMACS~J0723.3-7327 which acts as a gravitational lens and was recently imaged with the \textit{Hubble Space Telescope} in the framework of the \textit{Reionization Lensing Cluster Survey} program (RELICS). To facilitate studies by the community with the upcoming JWST data, we publish here a lens model for SMACS0723 -- including mass-density and magnification maps. We identify in the HST imaging five multiple-image families for three of which membership and redshift are secured by public spectroscopic data. For the remaining two systems we rely on robust photometric redshift estimates. We use here the \texttt{Light-Traces-Mass} lens modeling method, which complements the parametric models already available on the RELICS website and elsewhere, and thus helps span a representative range of solutions. The new models published here can be accessed via a link given below${}^b$. It will be interesting to examine by how much and which properties of the mass models change, and improve, when JWST data are incorporated.

9 pages; 6 figures; 1 table; to be submitted; comments welcome.\\ a) https://www.nasa.gov/feature/goddard/2022/nasa-shares-list-of-cosmic-targets-for-webb-telescope-s-first-images\\ b) https://www.dropbox.com/sh/svc84qmnlh05lmc/AABFQs_0VXE6Fh8jWbAgh4sza?dl=0

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Cited by in corpus (5)

• Revealing Galaxy Candidates out to $z\sim 16$ with JWST Observations of the Lensing Cluster SMACS0723
• Detection of Intracluster Globular Clusters in the First JWST Images of the Gravitational Lens Cluster SMACS J0723.3-7327 at z = 0.39
• The JWST view of the barred galaxy population in the SMACS0723 galaxy cluster
• A variable active galactic nucleus at $z=2.06$ triply-imaged by the galaxy cluster MACS J0035.4-2015
• What Multiple Images Say About the Large-Scale Mass Maps of Galaxy Clusters