{"paper":{"title":"A Post-starburst Galaxy Undergoing Ram-pressure Stripping at Redshift 3.06","license":"http://creativecommons.org/licenses/by/4.0/","headline":"A post-starburst galaxy at redshift 3.06 is undergoing ram-pressure stripping.","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Anton M. Koekemoer, Bjorn H. C. Emonts, Christopher N. A. Willmer, Eiichi Egami, Fengwu Sun, Franz E. Bauer, Fujiang Yu, Fuyan Bian, J. Xaiver Prochaska, Ming Sun, Mingyu Li, Seiji Fujimoto, Vasily Kokorev, Xiaohui Fan, Xiaojing Lin, Yunjing Wu, Zechang Sun, Zheng Cai, Zihao Li","submitted_at":"2026-04-13T18:00:05Z","abstract_excerpt":"Understanding how galaxies ignite and extinguish their star formation remains a cornerstone question in modern astrophysics. Recent JWST surveys have revealed an overabundance of massive quiescent galaxies in the first billion years of the Universe, challenging current models of galaxy evolution. In the nearby Universe, ram pressure stripping (RPS) is a major environmental mechanism capable of rapidly shutting down star formation, yet direct observation remains scarce at redshift $z\\gtrsim1$, and its role at $z>2$ is even poorly constrained by simulations. Here, we utilize JWST and ALMA observ"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"we utilize JWST and ALMA observations to present direct evidence of RPS in the post-starburst galaxy A2744-JF-z3, residing in a galaxy group at redshift 3.06, the earliest such detection to date.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The spectroscopic diagnostics and spectral energy distribution modeling correctly attribute the observed gas and dust removal specifically to ram-pressure stripping rather than other mechanisms such as AGN feedback, mergers, or observational biases at high redshift.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Earliest direct evidence of ram-pressure stripping quenching star formation in a galaxy at z=3.06.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A post-starburst galaxy at redshift 3.06 is undergoing ram-pressure stripping.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1e49cb38b111e837ac8daa51e8852f123dd253dbb36b8ce4804b9486d828be23"},"source":{"id":"2604.11892","kind":"arxiv","version":2},"verdict":{"id":"8a9737c9-c7ff-40fd-826e-7f3b53f2e529","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T16:28:41.750587Z","strongest_claim":"we utilize JWST and ALMA observations to present direct evidence of RPS in the post-starburst galaxy A2744-JF-z3, residing in a galaxy group at redshift 3.06, the earliest such detection to date.","one_line_summary":"Earliest direct evidence of ram-pressure stripping quenching star formation in a galaxy at z=3.06.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The spectroscopic diagnostics and spectral energy distribution modeling correctly attribute the observed gas and dust removal specifically to ram-pressure stripping rather than other mechanisms such as AGN feedback, mergers, or observational biases at high redshift.","pith_extraction_headline":"A post-starburst galaxy at redshift 3.06 is undergoing ram-pressure stripping."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.11892/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"}