{"paper":{"title":"Efficient Ionizers with Low H$\\boldsymbol{\\beta}$+[OIII] Equivalent Widths: JADES Spectroscopy of a Peculiar High-z Population","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aayush Saxena, Alex J. Cameron, Andrew J. Bunker, Charlotte Simmonds, Chris Willott, Daniel Stark, Isaac H. Laseter, Joris Witstok, Kristan Boyett, Michael V. Maseda, Mirko Curti, Pierluigi Rinaldi, Rachana Bhatawdekar, Ryan Endsley, Sandro Tacchella, Stefano Carniani, Yongda Zhu, Zhiyuan Ji","submitted_at":"2024-12-05T19:00:00Z","abstract_excerpt":"Early JWST photometric studies discovered a population of UV faint ($\\rm <L^{*}_{UV}$) $z \\sim 6.5-8$ Lyman break galaxies with spectral energy distributions implying young ages ($\\sim10$ Myr) yet relatively weak H$\\beta$+[OIII] equivalent widths ($\\rm EW_{H\\beta+[OIII]} \\approx 400$\\r{A}). These galaxies seemingly contradict the implicit understanding that young star-forming galaxies are ubiquitously strong H$\\beta$+[OIII] emitters, i.e., extreme emission line galaxies (EW $\\rm \\gtrsim 750$\\r{A}). Low metallicities, high Lyman continuum escape fractions, and rapidly declining star-formation h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.04542","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/2412.04542/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"}