20.500.12556/RUL-168902 CANUCS constraining the MACS J0416.1-2403 strong lensing model with JWST NIRISS, NIRSpec and NIRCam Context. Strong gravitational lensing in galaxy clusters has become an essential tool in astrophysics, as it allows one to directly probe the dark matter distribution and study magnified background sources. The precision and reliability of strong lensing models rely heavily on the number and quality of multiple images of background sources with spectroscopic redshifts. Aims. We present an updated strong lensing model of the galaxy cluster MACS J0416.1-2403 with the largest sample of multiple images with spectroscopic redshifts in a galaxy cluster field to date. Furthermore, we aim to demonstrate the effectiveness of JWST, particularly its NIRISS camera, for strong lensing studies. Methods. We used JWST's NIRCam imaging and NIRSpec and NIRISS spectroscopy from the CAnadian NIRISS Unbiased Cluster Survey (CANUCS). The cluster mass model was constrained using Lenstool software. Results. Our new dataset, which we used for constraining the lens model, comprises 303 secure multiple images with spectroscopic redshifts from 111 background sources and includes 95 systems with previously known MUSE redshift and 16 systems (with 46 multiple images) for which we obtained spectroscopic redshift for the first time using NIRISS and NIRSpec spectroscopy. Three of the spectroscopic systems were not identified by previous JWST studies. The total number of secure spectroscopic systems is more than 20% higher than in the previous strong lensing studies of this cluster. The derived strong lensing model can reproduce multiple images with the root-mean-square distance of ∼0″.52. We also provide a full catalogue with 415 multiple images, including less reliable candidates. In total, we provide 15 new multiple-image system candidates (with 38 multiple images) not reported in previous studies. Furthermore, we demonstrate the effectiveness of JWST, particularly NIRISS, for obtaining spectroscopic redshifts of multiple images. As NIRISS F115W, F150W, and F200W grism spectroscopy captures at least two of the [O II] λ3727, [O III] λλ4959, 5007, and Hα lines at 1 ≲ z ≲ 3 (a redshift range particularly relevant for strong lensing studies) without target pre-selection, it complements MUSE and NIRSpec observations extremely well. gravitational lensing astrophysics of galaxies high-redshift galaxies true false true Angleški jezik Angleški jezik Članek v reviji 2025-05-06 13:16:28 2025-05-06 13:16:29 2025-05-07 04:05:41 0000-00-00 00:00:00 2025 0 0 15 str. art. A15 Vol. 696 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 524.8 1432-0746 10.1051/0004-6361/202451117 234820611 aa51117-24.pdf aa51117-24.pdf 1 1DFD42C79C951F1AFC6B0D701C6494D3 2211bb9339c19519db011e506a228fd3c0c3ac670c662e395c64e1da3aeef288 de83c446-2a6b-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=209992 https://www.aanda.org/articles/aa/pdf/2025/04/aa51117-24.pdf 1 6131109a-2a6a-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=209991 Fakulteta za matematiko in fiziko 0 0 0