{"paper":{"title":"The Cosmic Evolution and Spatial Distribution of Multiphase Gas associated with QSOs","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cheng Jia, Chengyu Ma, Cheqiu Lyu, Enci Wang, Haoran Yu, Huiyuan Wang, Hu Zou, Runyu Zhu, Weiyu Ding, Xu Kong, Yang Gao, Zeyu Chen, Zhicheng He","submitted_at":"2025-05-17T09:05:01Z","abstract_excerpt":"We investigate the multi-phase gas surrounding QSOs traced by 33 absorption lines (e.g., Ly$\\alpha$, C\\,\\textsc{iv}, Fe\\,\\textsc{ii}, Mg\\,\\textsc{ii}, etc.) in the stacked spectra of background sources, using the early data release from the Dark Energy Spectroscopic Instrument. Our analysis reveals that the equivalent width (\\( W \\)) of metal absorption lines decreases with increasing redshift, following an overall trend described by $W \\propto (1+z)^{-4.0\\pm 2.7}$. Different species that trace multi-phases of QSO-associated gas exhibit distinct evolutionary patterns. Additionally, the \\( W \\)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.11919","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/2505.11919/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"}