{"paper":{"title":"SDSS IV MaNGA - Metallicity and nitrogen abundance gradients in local galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Christy Tremonti, Daniel Thomas, Francesco Belfiore, Jonathan Brinkmann, Kevin Bundy, Kyle Westfall, Lihwai Lin, Matthew Bershady, M\\'ed\\'eric Boquien, Niv Drory, Roberto Maiolino, Sebastian F. S\\'anchez","submitted_at":"2017-03-10T19:00:12Z","abstract_excerpt":"We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star forming regions in a representative sample of 550 nearby galaxies in the stellar mass range $\\rm 10^9-10^{11.5} M_\\odot$ with resolved spectroscopic data from the SDSS-IV MaNGA survey. Using strong-line ratio diagnostics (R23 and O3N2 for metallicity and N2O2 for N/O) and referencing to the effective (half-light) radius ($\\rm R_e$), we find that the metallicity gradient steepens with stellar mass, lying roughly flat among galaxies with $\\rm log(M_\\star/M_\\odot) = 9.0$ but exhibiting slopes as steep as -0.1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03813","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"}