{"paper":{"title":"Clues to inside-out quenching in quiescent galaxies at $1.2\\lesssim z\\lesssim2.2$: Age, Fe-, and Mg-abundance gradients from JWST-SUSPENSE","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Distant quiescent galaxies have older cores with flat iron abundances, suggesting inside-out quenching.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Muzzin, Aliza G. Beverage, Andrew B. Newman, Anna de Graaff, Arjen van der Wel, Brian Lorenz, Chloe M. Cheng, Daniel R. Weisz, Danilo Marchesini, Guillermo Barro, Ignacio Mart\\'in-Navarro, Jesse van de Sande, Katherine A. Suess, Mariska Kriek, Martje Slob, Natascha M. F\\\"orster Schreiber, Pieter G. van Dokkum, Rachel Bezanson, Sedona H. Price","submitted_at":"2025-09-15T18:00:02Z","abstract_excerpt":"[Abridged] Spatially resolved stellar populations of massive quiescent galaxies at cosmic noon provide powerful insights into quenching and assembly mechanisms. Previous photometric studies have revealed that the cores of these galaxies are redder than their outskirts. However, spectroscopy is needed to break the age-metallicity degeneracy and uncover the driver of colour gradients. We derive age and elemental abundance gradients for eight distant ($1.2 \\lesssim z \\lesssim 2.2$), massive ($10.3\\lesssim\\log({\\rm M}_*/{\\rm M}_\\odot)\\lesssim 11.1$) quiescent galaxies by fitting full-spectrum mode"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"These galaxies have negative age gradients and flat [Fe/H] gradients, with tentative positive [Mg/H] and [Mg/Fe] gradients, suggesting galaxy cores are older and perhaps Mg-deficient compared to outskirts, consistent with inside-out quenching.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The full-spectrum fitting models correctly break the age-metallicity degeneracy and recover true radial gradients without significant biases from template libraries, dust, or IMF assumptions (implicit in the methods section describing the fitting procedure).","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Negative age gradients and flat [Fe/H] gradients in high-redshift quiescent galaxies from NIRSpec-MSA spectroscopy suggest cores formed and quenched earlier than outskirts.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Distant quiescent galaxies have older cores with flat iron abundances, suggesting inside-out quenching.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6bacb2a3ab687fbac380ebe7abb37db6dc81c7ce3f5892cc45f8c88ffa4fbb8f"},"source":{"id":"2509.12316","kind":"arxiv","version":4},"verdict":{"id":"27a850f3-f245-4163-80a5-130dcc88c770","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-18T15:51:23.492504Z","strongest_claim":"These galaxies have negative age gradients and flat [Fe/H] gradients, with tentative positive [Mg/H] and [Mg/Fe] gradients, suggesting galaxy cores are older and perhaps Mg-deficient compared to outskirts, consistent with inside-out quenching.","one_line_summary":"Negative age gradients and flat [Fe/H] gradients in high-redshift quiescent galaxies from NIRSpec-MSA spectroscopy suggest cores formed and quenched earlier than outskirts.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The full-spectrum fitting models correctly break the age-metallicity degeneracy and recover true radial gradients without significant biases from template libraries, dust, or IMF assumptions (implicit in the methods section describing the fitting procedure).","pith_extraction_headline":"Distant quiescent galaxies have older cores with flat iron abundances, suggesting inside-out quenching."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2509.12316/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"}