{"paper":{"title":"Gas-Phase Metallicity and Nitrogen Abundances in Low-Mass Galaxies Down to $M_\\star\\simeq10^{5.7}\\,M_\\odot$ at $z\\simeq4.5$--$10.1$ from JWST Lensing Cluster Surveys","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hidenobu Yajima, Hiroya Umeda, Kimihiko Nakajima, Kuria Watanabe, Masami Ouchi, Moka Nishigaki, Ono Yoshiaki, Yi Xu, Yuichi Harikane, Yuki Isobe","submitted_at":"2026-07-17T00:02:41Z","abstract_excerpt":"We analyze 405 deep JWST/NIRSpec spectra of star-forming galaxies at $z=4.5$--$10.1$ from DREAMS and other lensing-cluster surveys to study chemical enrichment in intrinsically faint, low-mass galaxies. The sample covers $M_{\\rm UV}\\simeq-12$ to $-22$ and reaches $M_\\star\\simeq10^{5.7}\\,M_\\odot$, with 50\\% of the sources at $M_{\\rm UV}>-17.5$ magnified by $\\mu>3$. From individual spectra and mass-binned stacks, we derive the gas-phase metallicity together with nitrogen and carbon abundances using the rest-frame UV and optical lines. \\Add{We derive new empirical strong-line metallicity calibrat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15515","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/2607.15515/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"}