{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:3SVTU33DKKF7M6OVRY2TETZCVJ","short_pith_number":"pith:3SVTU33D","schema_version":"1.0","canonical_sha256":"dcab3a6f63528bf679d58e35324f22aa6d5bc5e080da58b110724c3a11ba6de0","source":{"kind":"arxiv","id":"astro-ph/0702716","version":1},"attestation_state":"computed","paper":{"title":"The Dynamical Implications of Multiple Stellar Formation Events in Galactic Globular Clusters","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alison Sills, Jonathan M.B. Downing","submitted_at":"2007-02-27T15:10:51Z","abstract_excerpt":"Various galactic globular clusters display abundance anomalies that affect the morphology of their colour-magnitude diagrams. In this paper we consider the possibility of helium enhancement in the anomalous horizontal branch of NGC 2808. We examine the dynamics of a self-enrichment scenario in which an initial generation of stars with a top-heavy initial mass function enriches the interstellar medium with helium via the low-velocity ejecta of its asymptotic giant branch stars. This enriched medium then produces a second generation of stars which are themselves helium-enriched. We use a direct "},"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":"astro-ph/0702716","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-27T15:10:51Z","cross_cats_sorted":[],"title_canon_sha256":"f7c9b3c53a78522e9732967b5d485a9d45c30aa9ee3e3d3c2330998e8401f266","abstract_canon_sha256":"39fc0d6bf5b2dc38271e1ceec4b6669cc06f1b37f746ef1cb4405cbe4fae46e9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:06.190092Z","signature_b64":"7PfVdLosmZ3K+b71jsE5QrvQF+JhwrS3oIl+CiRN3pcwXqK40mUGkYZIxb3NHNeKDd7/cn0UFt9Mk0KYLCW9DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcab3a6f63528bf679d58e35324f22aa6d5bc5e080da58b110724c3a11ba6de0","last_reissued_at":"2026-05-18T04:29:06.189587Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:06.189587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Dynamical Implications of Multiple Stellar Formation Events in Galactic Globular Clusters","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alison Sills, Jonathan M.B. Downing","submitted_at":"2007-02-27T15:10:51Z","abstract_excerpt":"Various galactic globular clusters display abundance anomalies that affect the morphology of their colour-magnitude diagrams. In this paper we consider the possibility of helium enhancement in the anomalous horizontal branch of NGC 2808. We examine the dynamics of a self-enrichment scenario in which an initial generation of stars with a top-heavy initial mass function enriches the interstellar medium with helium via the low-velocity ejecta of its asymptotic giant branch stars. This enriched medium then produces a second generation of stars which are themselves helium-enriched. We use a direct "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702716","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":""},"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":"astro-ph/0702716","created_at":"2026-05-18T04:29:06.189677+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702716v1","created_at":"2026-05-18T04:29:06.189677+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702716","created_at":"2026-05-18T04:29:06.189677+00:00"},{"alias_kind":"pith_short_12","alias_value":"3SVTU33DKKF7","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_16","alias_value":"3SVTU33DKKF7M6OV","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_8","alias_value":"3SVTU33D","created_at":"2026-05-18T12:25:54.717736+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ","json":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ.json","graph_json":"https://pith.science/api/pith-number/3SVTU33DKKF7M6OVRY2TETZCVJ/graph.json","events_json":"https://pith.science/api/pith-number/3SVTU33DKKF7M6OVRY2TETZCVJ/events.json","paper":"https://pith.science/paper/3SVTU33D"},"agent_actions":{"view_html":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ","download_json":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ.json","view_paper":"https://pith.science/paper/3SVTU33D","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0702716&json=true","fetch_graph":"https://pith.science/api/pith-number/3SVTU33DKKF7M6OVRY2TETZCVJ/graph.json","fetch_events":"https://pith.science/api/pith-number/3SVTU33DKKF7M6OVRY2TETZCVJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ/action/storage_attestation","attest_author":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ/action/author_attestation","sign_citation":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ/action/citation_signature","submit_replication":"https://pith.science/pith/3SVTU33DKKF7M6OVRY2TETZCVJ/action/replication_record"}},"created_at":"2026-05-18T04:29:06.189677+00:00","updated_at":"2026-05-18T04:29:06.189677+00:00"}