{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:UR7UUHT4NWT5RN6ZCUCA2SSU2T","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"aa7ac0a49785e29570318b5d04c3a0e9467b924bf8634db49267fff80c68d94f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-15T20:00:29Z","title_canon_sha256":"2a0ecc4329a58013796debadc2e271b9d2616c29553b1dfb488ca5e2a4d68551"},"schema_version":"1.0","source":{"id":"1109.3463","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3463","created_at":"2026-05-18T02:00:32Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3463v2","created_at":"2026-05-18T02:00:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3463","created_at":"2026-05-18T02:00:32Z"},{"alias_kind":"pith_short_12","alias_value":"UR7UUHT4NWT5","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"UR7UUHT4NWT5RN6Z","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"UR7UUHT4","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:6f6697d1005de015f6e0f7ea56bdc4c74fce688c905735ff618aa1eec0ad2e47","target":"graph","created_at":"2026-05-18T02:00:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Recent observations and modeling of globular clusters with multiple populations strongly indicate the presence of super helium-rich subpopulations in old stellar systems. Motivated by this, we have constructed new population synthesis models with and without helium-enhanced subpopulations to investigate their impact on the UV-upturn phenomenon of quiescent early-type galaxies. We find that our models with helium- enhanced subpopulations can naturally reproduce the strong UV-upturns observed in giant elliptical galaxies assuming an age similar to that of old globular clusters in the Milky Way. ","authors_text":"Chul Chung, Suk-Jin Yoon, Young-Wook Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-15T20:00:29Z","title":"The effect of helium-enhanced stellar populations on the ultraviolet-upturn phenomenon of early-type galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3463","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7ecd479e11a647be96c70c6f127d339159f0a8eacb8df361845ccc7fd65c60bc","target":"record","created_at":"2026-05-18T02:00:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"aa7ac0a49785e29570318b5d04c3a0e9467b924bf8634db49267fff80c68d94f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-15T20:00:29Z","title_canon_sha256":"2a0ecc4329a58013796debadc2e271b9d2616c29553b1dfb488ca5e2a4d68551"},"schema_version":"1.0","source":{"id":"1109.3463","kind":"arxiv","version":2}},"canonical_sha256":"a47f4a1e7c6da7d8b7d915040d4a54d4e0912b5e15c8087b684cd875ac4a0f0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a47f4a1e7c6da7d8b7d915040d4a54d4e0912b5e15c8087b684cd875ac4a0f0b","first_computed_at":"2026-05-18T02:00:32.231562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:32.231562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ER2YqVTrk1gtN5w+Ek+R3jS9b2MhaWoVo20sgDV3ATeQPkbsa9YzeUQqMJbLxu4IeScUg7gmsekOSqp8klvOCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:32.232179Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.3463","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ecd479e11a647be96c70c6f127d339159f0a8eacb8df361845ccc7fd65c60bc","sha256:6f6697d1005de015f6e0f7ea56bdc4c74fce688c905735ff618aa1eec0ad2e47"],"state_sha256":"16c68c1a251d12f4de8293173d43d776f4d607b6cfd1513ae012bf4d7ed1f48f"}