{"paper":{"title":"Quiescent Host Galaxies of Extended Quasars Revealed by Spectrophotometric Decomposition","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"Aaron Meisner, Andrew Lambert, Axel de la Macorra, Benjamin Alan Weaver, David Brooks, David Schlegel, David Sprayberry, Enrique Gazta\\~naga, Eusebio Sanchez, Gaocheng Yin, Gaston Gutierrez, Gregory Tarl\\'{e}, Hee-Jong Seo, Ignasi P\\'erez-R\\'afols, John Moustakas, Linhua Jiang, Ma\\l gorzata Siudek, Mar Mezcua, Martin Landriau, Michael Schubnell, Peter Doel, Ramon Miquel, Rongpu Zhou, Shengxiu Sun, Steven Ahlen, Swayamtrupta Panda, Theodore Kisner, Todd Claybaugh, Wei-Jian Guo, Zhiwei Pan","submitted_at":"2026-07-30T18:00:08Z","abstract_excerpt":"Previous works of low-redshift quasar host galaxies have focused on compact quasars and found that their host galaxies are mainly star-forming galaxies. Here we present a study of host galaxies for quasars with extended morphologies in ground-based optical images. We select a sample of more than 1000 type 1 quasars at redshift $0.1<z<1$ that are classified as extended objects by DESI. Combining high-resolution spectra from DESI and high-quality images from Subaru HSC, we develop a spectrophotometric decomposition technique to iteratively decompose each quasar into an AGN component and its host"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.28732","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.28732/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"}