{"paper":{"title":"ALMA reveals diverse dust-to-gas mass ratios and quenching modes in old quiescent galaxies","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Allison W. S. Man, Ambra Nanni, Arianna Long, Christopher Lovell, Ciro Pappalardo, Daizhong Liu, Darko Donevski, Desika Narayanan, Giuliano Lorenzon, Giulia Rodighiero, Irene Shivaei, Ivana Damjanov, Junais, Katherine E. Whitaker, Krzysztof Lisiecki, Mahmoud Hamed, Michael Romano, Minju M. Lee, Prasad Sawant, Romeel Dave, Sirio Belli","submitted_at":"2025-09-12T09:15:56Z","abstract_excerpt":"Recent discoveries of dust and molecular gas in quiescent galaxies (QGs) up to $z\\sim3$ challenge the long-standing view that the interstellar medium depletes rapidly once star formation ceases, raising key questions of whether dust and gas co-evolve in QGs, and how their depletion links to stellar aging. We present deep Atacama Large Millimeter/submillimeter Array (ALMA) Band~6 continuum and CO(3--2) observations of 17 QGs at $z\\sim0.4$ in the COSMOS field. Using the dust-to-molecular gas mass ratio ($\\delta_{\\rm DGR}$) as a key diagnostic, we trace post-quenching evolution of the cold inters"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.10079","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/2509.10079/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"}