{"paper":{"title":"Calibration and Limitations of the Mg II line-based Black Hole Masses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Daeseong Park, Dawoo Park, Huynh Anh N. Le, Jong-Hak Woo, Marios Karouzos, Matthew A. Malkan, Tommaso Treu, Vardha N. Bennert","submitted_at":"2018-04-09T02:43:17Z","abstract_excerpt":"We present the single-epoch black hole mass (M$_{\\rm BH}$) calibrations based on the rest-frame UV and optical measurements of Mg II 2798\\AA\\ and H$\\beta$ 4861\\AA\\ lines and AGN continuum, using a sample of 52 moderate-luminosity AGNs at z$\\sim$0.4 and z$\\sim$0.6 with high-quality Keck spectra. We combine this sample with a large number of luminous AGNs from the Sloan Digital Sky Survey to increase the dynamic range for a better comparison of UV and optical velocity and luminosity measurements. With respect to the reference M$_{\\rm BH}$ based on the line dispersion of H$\\beta$ and continuum lu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.02798","kind":"arxiv","version":4},"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"}