{"paper":{"title":"The MOSDEF Survey: Electron Density and Ionization Parameter at $z\\sim2.3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alice E. Shapley, Alison L. Coil, Bahram Mobasher, Brian Siana, Irene Shivaei, Laura de Groot, Mariska Kriek, Naveen A. Reddy, Ryan L. Sanders, Sedona H. Price, William R. Freeman","submitted_at":"2015-09-11T20:03:31Z","abstract_excerpt":"Using observations from the MOSFIRE Deep Evolution Field (MOSDEF) survey, we investigate the physical conditions of star-forming regions in $z\\sim2.3$ galaxies, specifically the electron density and ionization state. From measurements of the [O II]$\\lambda\\lambda$3726,3729 and [S II]$\\lambda\\lambda$6716,6731 doublets, we find a median electron density of $\\sim250$ cm$^{-3}$ at $z\\sim2.3$, an increase of an order of magnitude compared to measurements of galaxies at $z\\sim0$. While $z\\sim2.3$ galaxies are offset towards significantly higher O$_{32}$ values relative to local galaxies at fixed ste"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03636","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"}