{"paper":{"title":"GA-NIFS and JADES: Confirmation of pristine gas near GN-z11","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrew J. Bunker, Benjamin D. Johnson, Brant Robertson, Bruno Rodr\\'iguez Del Pino, Chiara Circosta, Christopher N. A. Willmer, Daniel J. Eisenstein, Elena Bertola, Eleonora Parlanti, Elka Rusta, Emma Curtis-Lake, Francesco D'Eugenio, Gareth C. Jones, Giacomo Venturi, Giovanni Cresci, Hannah \\\"Ubler, Jacopo Chevallard, Jan Scholtz, Joris Witstok, Kevin Hainline, Kimihiko Nakajima, Michele Perna, Mirko Curti, Nimisha Kumari, Pablo G. P\\'erez-Gonz\\'alez, Pierluigi Rinaldi, Roberto Maiolino, Sandra Zamora, Sandro Tacchella, Santiago Arribas, Stefania Salvadori, Stefano Carniani, St\\'ephane Charlot, Torsten B\\\"oker, Yuki Isobe","submitted_at":"2026-03-20T17:05:07Z","abstract_excerpt":"According to the leading cosmological model, a first generation of stars called Population III (PopIII), condensed almost entirely out of hydrogen and helium, must have initiated the creation of all heavier chemical elements. We report the detection of ionised hydrogen (H$\\gamma_{4342}$) with a signal-to-noise ratio of $S/N$=5.9 in a region about 3 pkpc (projected) north-east from the z~10.6 galaxy GN-z11, where line emission compatible with doubly ionised helium (HeII$_{1640}$) has been found. Our new JWST/NIRSpec-IFU G395H data confirm the authenticity of the previous detection at a redshift"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.20360","kind":"arxiv","version":2},"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/2603.20360/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"}