{"paper":{"title":"AGN Emission Line Diagnostics and the Mass-Metallicity Relation up to Redshift z~2: the Impact of Selection Effects and Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"(2) IAP, (3) Pennsylvania State University, (4) Leiden Observatory, (5) NOAO, 6), (6) Paris-Meudon, (7) Yonsei University), Camilla Pacifici (7), Corentin Schreiber (1) ((1) CEA Saclay, David Elbaz (1), Emanuele Daddi (1), Emeric Le Floc'h (1), Fr\\'ed\\'eric Bournaud (1), Ingrid Jean-Baptiste (1, Jarle Brinchmann (4), Jonathan R. Trump (3), Mark Dickinson (5), Maurilio Pannella (1), M. D. Lehnert (2, Pierre-Alain Duc (1), Raphael Gobat (1), St\\'ephane Charlot (2), St\\'ephanie Juneau (1)","submitted_at":"2014-03-26T20:00:03Z","abstract_excerpt":"Emission line diagnostic diagrams probing the ionization sources in galaxies, such as the Baldwin-Phillips-Terlevich (BPT) diagram, have been used extensively to distinguish AGN from purely star-forming galaxies. Yet, they remain poorly understood at higher redshifts. We shed light on this issue with an empirical approach based on a z~0 reference sample built from ~300,000 SDSS galaxies, from which we mimic selection effects due to typical emission line detection limits at higher redshift. We combine this low-redshift reference sample with a simple prescription for luminosity evolution of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.6832","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"}