{"paper":{"title":"Reconstructing chemical enrichment pathways in disc galaxies: A phylogenetic approach","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Phylogenetic trees built from stellar chemical abundances reveal distinct enrichment histories in inner and outer regions of a simulated disc galaxy.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"\\'Alvaro M\\'arquez S., \\'Alvaro Rojas-Arriagada, Brian Tapia-Contreras, Claudia Aguilera-G\\'omez, Emanuel Sillero, Francisco Jara-Ferreira, Keaghan Yaxley, Patricia B. Tissera, Paula Jofr\\'e, Payel Das, Robert A. Foley, Robert M. Yates, Theosamuele Signor, Xia Hua","submitted_at":"2026-04-13T19:07:55Z","abstract_excerpt":"Phylogenetic methods, traditionally used in biology to trace the evolutionary relationships among species, are emerging as a powerful framework to reconstruct evolutionary processes in galaxies from chemical information. We apply galactic phylogenetics to study the chemical evolution of stellar populations in distinct regions of a simulated disc galaxy, assessing its capability to unveil assembly histories. We used a high-resolution simulation that follows the chemical enrichment of an isolated disc galaxy, by different stellar progenitors. We track gas particles as they turn into stars and in"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Galactic phylogenetics provides a novel and complementary tool to decode the fossil record of galaxies.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That phylogenetic trees constructed from chemical abundances in the simulation accurately reflect real enrichment pathways and assembly histories rather than simulation-specific artifacts.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Phylogenetic trees from stellar chemical abundances in a simulated disc galaxy reveal distinct structures in inner versus outer regions, indicating rapid early enrichment inside and smoother gradients outside.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Phylogenetic trees built from stellar chemical abundances reveal distinct enrichment histories in inner and outer regions of a simulated disc galaxy.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"70887ef85611d74151764c899b5d37e3963345d2722d805147e2e6a5e2e7d8e3"},"source":{"id":"2604.11974","kind":"arxiv","version":2},"verdict":{"id":"4a302969-7d85-4303-853f-40047adc5c64","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T15:34:42.934055Z","strongest_claim":"Galactic phylogenetics provides a novel and complementary tool to decode the fossil record of galaxies.","one_line_summary":"Phylogenetic trees from stellar chemical abundances in a simulated disc galaxy reveal distinct structures in inner versus outer regions, indicating rapid early enrichment inside and smoother gradients outside.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That phylogenetic trees constructed from chemical abundances in the simulation accurately reflect real enrichment pathways and assembly histories rather than simulation-specific artifacts.","pith_extraction_headline":"Phylogenetic trees built from stellar chemical abundances reveal distinct enrichment histories in inner and outer regions of a simulated disc galaxy."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.11974/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"}