{"paper":{"title":"SAPPHIRES: Extremely Metal-Poor Galaxy Candidates with $12+{\\rm log(O/H)}<7.0$ at $z\\sim5-7$ from Deep JWST/NIRCam Grism Observations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew J. Bunker, Dan Coe, Daniel J. Eisenstein, Eiichi Egami, Feige Wang, Fengwu Sun, Jakob M. Helton, Jinyi Yang, Koki Kakiichi, Masami Ouchi, Roberto Maiolino, Tiger Yu-Yang Hsiao, Wei Leong Tee, Weizhe Liu, Xiaohui Fan, Xiaojing Lin, Yichen Liu, Yi Xu, Yongda Zhu, Yoshinobu Fudamoto, Yuichi Harikane, Yunjing Wu","submitted_at":"2025-05-06T18:00:01Z","abstract_excerpt":"Population III stars, the hypothetical first generation metal-free stars, have yet to be discovered. Even after three years of successful JWST operations, studies have shown that most galaxies identified to date at $z > 5$ exhibit a metallicity floor of $Z\\gtrsim2\\%\\,Z_{\\odot}$, possibly due to unknown selection biases toward bright galaxies or rapid metal enrichment. To address this question, we search for galaxies with low R3$=$[OIII]$\\,\\lambda$5008/H$\\beta$ ratios as part of the JWST Cycle-3 large treasury program, the Slitless Areal Pure-Parallel HIgh-Redshift Emission Survey (SAPPHIRES). "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.03873","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/2505.03873/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"}