{"paper":{"title":"A Cosmic Archipelago of lensed metal-poor galaxies at $z\\sim6$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Adamo, A. Bolamperti, A. Mercurio, A. M. Koekemoer, A. Zanella, C. Grillo, E. Iani, E. Vanzella, F. Annibali, F. Calura, F. Loiacono, H. Yan, J. M. Diego, J. Vernet, K. Nakajima, M. Castellano, M. Gronke, M. Meneghetti, M. Messa, M. Ricotti, P. Bergamini, P. Rosati, R. A. Windhorst, S. Ravindranath","submitted_at":"2026-06-01T18:00:05Z","abstract_excerpt":"The Cosmic Archipelago is an ensemble of galaxies, strongly lensed by the cluster MACSJ0416, showing extreme physical properties at $z\\sim6.14$. We combine JWST/NIRCam with deep VLT/X-Shooter and JWST/NIRSpec IFU to perform a joint spectrophotometric analysis from the far ultraviolet to red optical rest-frame. We focus on CA4, a UV-faint ($M_{UV}=-17.7$), compact ($r_e=81\\pm11$ pc) galaxy at $z=6.1446$, magnified by a factor $\\mu=3.73$. CA4 is a young, low-mass ($M_\\star =4.3\\times10^6$ M$\\odot$), star-forming (${\\rm SFR}=0.46$ M$\\odot$/yr), and metal-poor ($Z\\sim0.02$ Z$\\odot$) galaxy, and an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02720","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.02720/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}