{"paper":{"title":"The Metallicity of High Redshift Galaxies: The Abundance of Zinc in 34 Damped Lyman Alpha Systems from z = 0.7 to 3.4","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"David L. King (Royal Greenwich Observatory), Linda J. Smith (University College London), Max Pettini (Royal Greenwich Observatory), Richard W. Hunstead (University of Sydney)","submitted_at":"1997-04-11T17:12:25Z","abstract_excerpt":"We report new observations of ZnII and CrII absorption lines in 10 damped \\lya systems (DLAs), mostly at redshift $z_{abs} \\simgt 2.5$ . By combining these results with those from our earlier survey (Pettini et al. 1994) and other recent data, we construct a sample of 34 measurements (or upper limits) of the Zn abundance relative to hydrogen [Zn/H]; the sample includes more than one third of the total number of DLAs known.\n  The plot of the abundance of Zn as a function of redshift reinforces the two main findings of our previous study. (1) Damped \\lya systems are mostly metal-poor, at all red"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9704102","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":""},"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"}