{"paper":{"title":"MSA-3D: Connecting the Chemical and Kinematic Structures of Galaxies at $z \\sim 1$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Dynamically hotter disks show flatter metallicity gradients in galaxies at z~1.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alaina Henry, Danail Obreschkow, Ivana Bari\\v{s}i\\'c, Juan M. Espejo Salcedo, Karl Glazebrook, Kevin Bundy, Matthew A. Malkan, Mengting Ju, Namrata Roy, Qianqiao Zhou, Takafumi Tsukui, Themiya Nanayakkara, Tucker Jones, Xin Wang, Xunda Sun","submitted_at":"2026-01-21T13:26:00Z","abstract_excerpt":"We investigate the connection between ionized gas kinematics and gas-phase metallicity gradients in 21 star-forming galaxies at $0.5 < z < 1.7$ from the MSA-3D survey, using spatially resolved JWST/NIRSpec slit-stepping observations. Galaxy kinematics are characterized by the ratio of rotational velocity to intrinsic velocity dispersion, $v/\\sigma$, measured at $1.5\\,R_e$, where $R_e$ is the effective radius. We find that dynamically hotter disks exhibit systematically flatter metallicity gradients, with a moderate anti-correlation between metallicity gradient and $v/\\sigma$ (Pearson $r=-0.43$"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Dynamically hotter disks exhibit systematically flatter metallicity gradients, with a moderate anti-correlation between metallicity gradient and v/σ (Pearson r=-0.43, p=0.05) and a significantly stronger anti-correlation with Re/σ (r=-0.59, p=0.005), indicating that cumulative radial mixing more directly regulates chemical stratification. The metallicity gradients in our sample are uniformly shallow.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That Re/σ serves as a reliable proxy for radial mixing timescale and that the reported anti-correlations reflect causal regulation by mixing rather than selection effects, stellar mass covariances, or measurement systematics in the sample of 21 galaxies.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Dynamically hotter galaxies at z~1 exhibit flatter metallicity gradients, suggesting turbulent mixing regulates chemical stratification in typical star-forming disks.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Dynamically hotter disks show flatter metallicity gradients in galaxies at z~1.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"837dd761e000cf5b4dd741ffa8d8adadab5092cc796ffc613567336ad5e9312a"},"source":{"id":"2601.14976","kind":"arxiv","version":2},"verdict":{"id":"002bfd62-e545-4d7b-aa13-d33656e703e2","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T12:18:53.522829Z","strongest_claim":"Dynamically hotter disks exhibit systematically flatter metallicity gradients, with a moderate anti-correlation between metallicity gradient and v/σ (Pearson r=-0.43, p=0.05) and a significantly stronger anti-correlation with Re/σ (r=-0.59, p=0.005), indicating that cumulative radial mixing more directly regulates chemical stratification. The metallicity gradients in our sample are uniformly shallow.","one_line_summary":"Dynamically hotter galaxies at z~1 exhibit flatter metallicity gradients, suggesting turbulent mixing regulates chemical stratification in typical star-forming disks.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That Re/σ serves as a reliable proxy for radial mixing timescale and that the reported anti-correlations reflect causal regulation by mixing rather than selection effects, stellar mass covariances, or measurement systematics in the sample of 21 galaxies.","pith_extraction_headline":"Dynamically hotter disks show flatter metallicity gradients in galaxies at z~1."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2601.14976/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":2,"snapshot_sha256":"8d77cde368cbd1b8c5c89e228d02a6c202ca4f7156862c8d9fdd6e3e71436737"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}