TY - JOUR
T1 - Unscrambling the Lensed Galaxies in JWST Images behind SMACS 0723
AU - Pascale, Massimo
AU - Frye, Brenda L.
AU - Diego, Jose
AU - Furtak, Lukas J.
AU - Zitrin, Adi
AU - Broadhurst, Tom
AU - Conselice, Christopher J.
AU - Dai, Liang
AU - Ferreira, Leonardo
AU - Adams, Nathan J.
AU - Kamieneski, Patrick
AU - Foo, Nicholas
AU - Kelly, Patrick
AU - Chen, Wenlei
AU - Lim, Jeremy
AU - Meena, Ashish K.
AU - Wilkins, Stephen M.
AU - Bhatawdekar, Rachana
AU - Windhorst, Rogier A.
N1 - Funding Information: MP was funded through the NSF Graduate Research Fellowship grant No. DGE 1752814, and acknowledges the support of System76 for providing computer equipment. BLF thanks Ori Ganor and the Berkeley Center for Theoretical Physics for their hospitality during the writing of this paper. The BGU group acknowledges support by grant No. 2020750 from the United States–Israel Binational Science Foundation (BSF) and grant No. 2109066 from the United States National Science Foundation (NSF), and by the Ministry of Science & Technology, Israel. C.C. and N.A. acknowledge support from the European Research Council (ERC) Advanced Investigator grant EPOCHS (788113). J.M.D. acknowledges the support of project PGC2018-101814-B-100 (MCIU/AEI/MINECO/FEDER, UE) Ministerio de Ciencia, Investigación y Universidades, and support by the Agencia Estatal de Investigación, Unidad de Excelencia María de Maeztu, ref. MDM-2017-0765. L.D. acknowledges the research grant support from the Alfred P. Sloan Foundation (Award Number FG-2021-16495). Funding Information: This work is based on observations made with the NASA/ESA Hubble Space Telescope (HST) and NASA/ESA/CSA James Webb Space Telescope (JWST) obtained from the Mikulski Archive for Space Telescopes ( MAST ) at the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST, and NAS 526555 for HST. These observations are associated with program 14096 for HST, and 2736 for JWST. This work is also based on observations made with ESO Telescopes at the La Silla Paranal Observatory obtained from the ESO Science Archive Facility. The authors thank the Centre for Astronomy and Particle Theory (CAPT) of the University of Nottingham for providing all computational infrastructure to run the JWST Reduction pipeline, and Philip Parry for technical support. LF acknowledges financial support from CAPES—Brazil. We also thank Anthony Holloway and Sotirios Sanidas at JBCA for critical help with the computer infrastructure that made this work possible. Publisher Copyright: © 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/10/1
Y1 - 2022/10/1
N2 - The first deep field images from the James Webb Space Telescope (JWST) of the galaxy cluster SMACS J0723.3-7327 reveal a wealth of new lensed images at uncharted infrared wavelengths, with unprecedented depth and resolution. Here we securely identify 14 new sets of multiply imaged galaxies totaling 42 images, adding to the five sets of bright and multiply imaged galaxies already known from Hubble Space Telescope data. We find examples of arcs crossing critical curves, allowing detailed community follow-up, such as JWST spectroscopy for precise redshift determinations, and measurements of the chemical abundances and of the detailed internal gas dynamics of very distant, young galaxies. One such arc contains a pair of compact knots that are magnified by a factor of hundreds, and features a microlensed transient. We also detect an Einstein cross candidate only visible thanks to JWST’s superb resolution. Our parametric lens model is available through the following link (https://www.dropbox.com/sh/gwup2lvks0jsqe5/AAC2RRSKce0aX-lIFCc9vhBXa?dl=0) and will be regularly updated using additional spectroscopic redshifts. The model is constrained by 16 of these sets of multiply imaged galaxies, three of which have spectroscopic redshifts, and reproduces the multiple images to better than an rms of 0.″5, allowing for accurate magnification estimates of high-redshift galaxies. The intracluster light extends beyond the cluster members, exhibiting large-scale features that suggest a significant past dynamical disturbance. This work represents a first taste of the enhanced power JWST will have for lensing-related science.
AB - The first deep field images from the James Webb Space Telescope (JWST) of the galaxy cluster SMACS J0723.3-7327 reveal a wealth of new lensed images at uncharted infrared wavelengths, with unprecedented depth and resolution. Here we securely identify 14 new sets of multiply imaged galaxies totaling 42 images, adding to the five sets of bright and multiply imaged galaxies already known from Hubble Space Telescope data. We find examples of arcs crossing critical curves, allowing detailed community follow-up, such as JWST spectroscopy for precise redshift determinations, and measurements of the chemical abundances and of the detailed internal gas dynamics of very distant, young galaxies. One such arc contains a pair of compact knots that are magnified by a factor of hundreds, and features a microlensed transient. We also detect an Einstein cross candidate only visible thanks to JWST’s superb resolution. Our parametric lens model is available through the following link (https://www.dropbox.com/sh/gwup2lvks0jsqe5/AAC2RRSKce0aX-lIFCc9vhBXa?dl=0) and will be regularly updated using additional spectroscopic redshifts. The model is constrained by 16 of these sets of multiply imaged galaxies, three of which have spectroscopic redshifts, and reproduces the multiple images to better than an rms of 0.″5, allowing for accurate magnification estimates of high-redshift galaxies. The intracluster light extends beyond the cluster members, exhibiting large-scale features that suggest a significant past dynamical disturbance. This work represents a first taste of the enhanced power JWST will have for lensing-related science.
UR - http://www.scopus.com/inward/record.url?scp=85140022804&partnerID=8YFLogxK
U2 - https://doi.org/10.3847/2041-8213/ac9316
DO - https://doi.org/10.3847/2041-8213/ac9316
M3 - Article
SN - 2041-8205
VL - 938
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L6
ER -