{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:RGBECHLCHIL2GSP7YTWXANPJHA","short_pith_number":"pith:RGBECHLC","schema_version":"1.0","canonical_sha256":"8982411d623a17a349ffc4ed7035e93808b6f9824ebfefcb59f728cb9ac5df80","source":{"kind":"arxiv","id":"2402.06628","version":1},"attestation_state":"computed","paper":{"title":"Stellar populations of massive early-type galaxies observed by MUSE","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Claudia Maraston, Jens Thomas, Kianusch Mehrgan, Ralf Bender, Roberto Saglia, Taniya Parikh","submitted_at":"2024-02-09T18:59:46Z","abstract_excerpt":"Stellar population studies of massive early-type galaxies (ETGs) suggest that the stellar initial mass function may not be universal. In particular, the centres of ETGs seem to contain an excess of low-mass dwarf stars compared to our own Galaxy. Through high resolution MUSE IFU data, we carry out a detailed study of the stellar populations of eight massive ETGs. We use full spectrum fitting to determine ages, element abundances, and IMF slopes for spatially binned spectra. We measure flat gradients in age and [Mg/Fe] ratio, as well as negative gradients in metallicity and [Na/Fe]. We detect I"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2402.06628","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-02-09T18:59:46Z","cross_cats_sorted":[],"title_canon_sha256":"b88afd73f3092f7da92b8a07ffb554ebf7edda00cd9e5db1ed94e22fd1dfdad8","abstract_canon_sha256":"b83f5e101574f2bc3a9d308c763a01b638b36b7e2a4841af13e5deee6424e295"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:43:28.131624Z","signature_b64":"OD9aubdQ70GkGOCotN3CmznA/bXXPjWbp2U32TriLh+ZS42J7ahcbaBWJGj3JrANl5yt1Qb2KddKgoc2ARBNBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8982411d623a17a349ffc4ed7035e93808b6f9824ebfefcb59f728cb9ac5df80","last_reissued_at":"2026-07-05T07:43:28.131181Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:43:28.131181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stellar populations of massive early-type galaxies observed by MUSE","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Claudia Maraston, Jens Thomas, Kianusch Mehrgan, Ralf Bender, Roberto Saglia, Taniya Parikh","submitted_at":"2024-02-09T18:59:46Z","abstract_excerpt":"Stellar population studies of massive early-type galaxies (ETGs) suggest that the stellar initial mass function may not be universal. In particular, the centres of ETGs seem to contain an excess of low-mass dwarf stars compared to our own Galaxy. Through high resolution MUSE IFU data, we carry out a detailed study of the stellar populations of eight massive ETGs. We use full spectrum fitting to determine ages, element abundances, and IMF slopes for spatially binned spectra. We measure flat gradients in age and [Mg/Fe] ratio, as well as negative gradients in metallicity and [Na/Fe]. We detect I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.06628","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/2402.06628/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2402.06628","created_at":"2026-07-05T07:43:28.131239+00:00"},{"alias_kind":"arxiv_version","alias_value":"2402.06628v1","created_at":"2026-07-05T07:43:28.131239+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.06628","created_at":"2026-07-05T07:43:28.131239+00:00"},{"alias_kind":"pith_short_12","alias_value":"RGBECHLCHIL2","created_at":"2026-07-05T07:43:28.131239+00:00"},{"alias_kind":"pith_short_16","alias_value":"RGBECHLCHIL2GSP7","created_at":"2026-07-05T07:43:28.131239+00:00"},{"alias_kind":"pith_short_8","alias_value":"RGBECHLC","created_at":"2026-07-05T07:43:28.131239+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2509.01732","citing_title":"SNELLS-HD I: a first look at the stellar properties of the massive strong-lens galaxy SNL-1 with 50 pc resolution","ref_index":60,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA","json":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA.json","graph_json":"https://pith.science/api/pith-number/RGBECHLCHIL2GSP7YTWXANPJHA/graph.json","events_json":"https://pith.science/api/pith-number/RGBECHLCHIL2GSP7YTWXANPJHA/events.json","paper":"https://pith.science/paper/RGBECHLC"},"agent_actions":{"view_html":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA","download_json":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA.json","view_paper":"https://pith.science/paper/RGBECHLC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2402.06628&json=true","fetch_graph":"https://pith.science/api/pith-number/RGBECHLCHIL2GSP7YTWXANPJHA/graph.json","fetch_events":"https://pith.science/api/pith-number/RGBECHLCHIL2GSP7YTWXANPJHA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA/action/storage_attestation","attest_author":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA/action/author_attestation","sign_citation":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA/action/citation_signature","submit_replication":"https://pith.science/pith/RGBECHLCHIL2GSP7YTWXANPJHA/action/replication_record"}},"created_at":"2026-07-05T07:43:28.131239+00:00","updated_at":"2026-07-05T07:43:28.131239+00:00"}