{"paper":{"title":"Measuring the Mean Free Path of HI Ionizing Photons at $3.2\\leq z\\leq4.6$ with DESI Y1 Quasars","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. de la Macorra, A. Kremin, A. Meisner, A. Mu\\~noz-Guti\\'errez, Anning Gao, Arjun Dey, B. A. Weaver, Cheng Zhao, D. Bianchi, D. Brooks, D. Sprayberry, E. Gazta\\~naga, E. Sanchez, G. Gutierrez, G. Rossi, G. Tarl\\'e, H. Zou, I. P\\'erez-R\\`afols, J. A. Newman, Jason X. Prochaska, J. E. Forero-Romero, J. Moustakas, K. Honscheid, M. Schubnell, P. Doel, P. Martini, R. Miquel, S. Ahlen, S. Gontcho A Gontcho, Siwei Zou, S. Juneau, T. Claybaugh, Zechang Sun, Zheng Cai","submitted_at":"2024-11-24T13:41:56Z","abstract_excerpt":"The mean free path of ionizing photons ($\\lambda_\\mathrm{mfp}^{912}$) in the intergalactic medium (IGM) is a crucial quantity in modelling the ionization state of IGM and the extragalactic ultraviolet background (EUVB), and is widely used in hydrodynamical simulations of galaxies and reionization. We construct the largest quasar spectrum dataset to date -- 12,595 $\\mathrm{S/N}>3$ spectra -- using the Y1 observation of Dark Energy Spectroscopic Instrument (DESI) to make the most precise model-independent measurement of the mean free path at $3.2\\leq z\\leq 4.6$. By stacking the spectra in 17 red"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.15838","kind":"arxiv","version":3},"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/2411.15838/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"}