{"paper":{"title":"(Re)Solving Reionization with Ly{\\alpha}: How Bright Ly{\\alpha} Emitters account for the $z\\approx2-8$ Cosmic Ionizing Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Ana Paulino-Afonso, Daniel Schaerer, David Sobral, Dawn Erb, Gabriele Pezzulli, Huub R\\\"ottgering, Jo\\~ao Calhau, Jorryt Matthee, Mario Llerena, Matthew Hayes, Max Gronke, Pascal A. Oesch, Ricardo Amor\\'in, Rohan P. Naidu, Sandro Tacchella","submitted_at":"2021-10-22T18:00:01Z","abstract_excerpt":"The cosmic ionizing emissivity from star-forming galaxies has long been anchored to UV luminosity functions. Here we introduce an emissivity framework based on Ly$\\alpha$ emitters (LAEs), which naturally hones in on the subset of galaxies responsible for the ionizing background due to the intimate connection between the production and escape of Ly$\\alpha$ and LyC photons. Using constraints on the escape fractions of bright LAEs ($L_{\\rm{Ly\\alpha}}>0.2 L^{*}$) at $z\\approx2$ obtained from resolved Ly$\\alpha$ profiles, and arguing for their redshift-invariance, we show that: (i) quasars and LAEs"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.11967","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2110.11967/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"}