{"paper":{"title":"Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at low redshift","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aaron Meisner, Adam Myers, Andrew Lambert, Axel de la Macorra, Benjamin Alan Weaver, Claire Poppett, David Brooks, David Sprayberry, Enrique Gazta\\~naga, Eusebio Sanchez, Francisco Prada, Graziano Rossi, Gregory Tarl\\'e, Hee-Jong Seo, Hu Zou, Jessica Nicole Aguilar, John Moustakas, Laurent Le Guillou, Linhua Jiang, Ma{\\l}gorzata Siudek, Marc Manera, Martin Landriau, Michael Schubnell, Paul Martini, Peter Doel, Ramon Miquel, Satya Gontcho A Gontcho, Shengxiu Sun, Stephanie Juneau, Steven Ahlen, Theodore Kisner, Todd Claybaugh, Wei-Jian Guo, Zhiwei Pan","submitted_at":"2025-02-06T00:12:04Z","abstract_excerpt":"We present a study on the possible overestimation of single-epoch supermassive black hole (SMBH) masses in previous works, based on more than 55,000 type 1 quasars at $0.25 < z < 0.8$ from the Dark Energy Spectroscopic Instrument (DESI). We confirm that iron emission strength serves as a good tracer of the Eddington ratio, and estimate SMBH masses using an iron-corrected $R$-$L$ relation for H$\\beta$, where $R$ is the broad line region size and $L$ is the continuum luminosity. Compared to our measurements, previous canonical measurements without the iron correction are overestimated by a facto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.03684","kind":"arxiv","version":1},"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/2502.03684/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"}