{"paper":{"title":"Electron temperature relations and the direct N, O, Ne, S and Ar abundances of 49959 star-forming galaxies in DESI Data Release 2","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. de la Macorra, A. Kremin, A. Meisner, A. Saintonge, B. Andrews, B. A. Weaver, B. Dey, C. Poppett, D. Bianchi, D. Brooks, D. Schlegel, D. Scholte, D. Sprayberry, E. Gazta\\~naga, E. Sanchez, F. Cullen, F. J. Castander, F. Prada, G. Gutierrez, G. Rossi, G. Tarl\\'e, H. Zou, I. P\\'erez-R\\`afols, J. Aguilar, J. E. Forero-Romero, J. Moustakas, J. Silber, J. Sui, K. Douglass, K. Z. Arellano-Cordova, L. Le Guillou, M. Landriau, O. Lahav, P. Doel, P. Martini, R. Joyce, R. Miquel, S. Ahlen, S. Ferraro, S. Gontcho A Gontcho, T. Cheng, T. Claybaugh, T. M. Stanton, W. J. Percival, Z. Shao","submitted_at":"2026-01-05T19:00:00Z","abstract_excerpt":"We present the largest direct-method abundance catalogue of galaxies to date, containing measurements of 49959 star-forming galaxies at z < 0.96 from DESI Data Release 2. By directly measuring electron temperatures across multiple ionisation zones, we provide constraints on a number of electron temperature relations. Using the temperature measurements, we derive reliable abundances for N, O, Ne, S and Ar and measure the evolution of abundances and abundance ratios of as a function of metallicity and other galaxy properties. Our measurements include direct oxygen abundances for 49507 galaxies, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.02463","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/2601.02463/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"}