{"paper":{"title":"Imprints of galaxy evolution on H ii regions Memory of the past uncovered by the CALIFA survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. de Lorenzo-C\\'aceres, A. D\\'iaz, A. Monreal-Ibero, A. Pasquali, A. R. Lopez-Sanchez, B. Ziegler, C. Kehrig, D. Bomans, D. Mast, D. Miralles-Caballero, E. Perez, F. F. Rosales-Ortega, G. van de Ven, J. Bland-Hawthorn, J. Iglesias-P\\'aramo, J. Mendez-Abreu, L. Galbany, L. S\\'anchez-Menguiano, L. Wisotzki, M.A. Mendoza, M. Moll\\'a, M. M. Roth, P. Papaderos, R. A. Marino, R. Garc\\'ia-Benito, R. Gonz\\'alez Delgado, S. Bekeraite, S. Ellis, S. F. Sanchez, the CALIFA collaboration","submitted_at":"2014-09-29T20:00:16Z","abstract_excerpt":"H ii regions in galaxies are the sites of star formation and thus particular places to understand the build-up of stellar mass in the universe. The line ratios of this ionized gas are frequently used to characterize the ionization conditions. We use the Hii regions catalogue from the CALIFA survey (~5000 H ii regions), to explore their distribution across the classical [OIII]/Hbeta vs. [NII]/Halpha diagnostic diagram, and how it depends on the oxygen abundance, ionization parameter, electron density, and dust attenuation. We compared the line ratios with predictions from photoionization models"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8293","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":""},"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"}