{"paper":{"title":"Extreme Ionizing Properties of Metal-Poor, Muv ~ -12 Star Complex in the first Gyr","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Acebron, A. Adamo, A. Bolamperti, A. Comastri, A. Mercurio, A. M. Koekemoer, A. Zanella, B. L. Frye, B. Sun, C. Grillo, C. Gruppioni, C. J. Conselice, C. Willott, E. Sani, E. Vanzella, F. Annibali, F. Calura, F. Loiacono, G. Rihtar, H. Yan, J. C. J. D'Silva, J. Summers, L. D. Bradley, M. Annunziatella, M. Bradac, M. Castellano, M. Dickinson, M. Gronke, M. Meneghetti, M. Messa, M. Mignoli, M. Ricotti, N. A. Grogin, P. Bergamini, P. Rosati, R. Gilli, R. Pascale, R. Windhorst, S. Ravindranath, U. Mestric, V. Strait","submitted_at":"2024-07-29T18:00:01Z","abstract_excerpt":"We report the serendipitous discovery of a faint (M_UV > -12.2), low-metallicity (Z ~ 0.02 Zsun), ionizing source (dubbed T2c) with a spectroscopic redshift of z=6.146. T2c is part of a larger structure amplified by the Hubble Frontier Field galaxy cluster MACSJ0416, and was observed with JWST/NIRSpec IFU. Stacking the short-wavelength NIRCam data reveals no stellar continuum detection down to a magnitude limit of m_UV ~ 31.0 (3 sigma). However, prominent Hb, [OIII]4959,5007, and Ha emissions are detected, with equivalent widths exceeding 200A, 800A, and 1300A (3 sigma), respectively. The corr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.20327","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/2407.20327/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"}