{"paper":{"title":"The Origin of \\lya Absorption Systems at $z>1$---Implications from the Hubble Deep Field","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alberto Fern\\'andez-Soto, Hsiao-Wen Chen, Kenneth M. Lanzetta","submitted_at":"1999-12-07T01:15:44Z","abstract_excerpt":"The Hubble Deep Field images have provided us with a unique chance to relate statistical properties of high-redshift galaxies to statistical properties of \\lya absorption systems. Combining an {\\em empirical} measure of the galaxy surface density versus redshift with an {\\em empirical} measure of the gaseous extent of galaxies, we predict the number density of \\lya absorption systems that originate in extended gaseous envelopes of galaxies versus redshift. We show that at least 50% and as much as 100% of observed \\lya absorption systems of $W\\apg0.32$ \\AA can be explained by extended gaseous e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9912122","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"}