{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:YHWDKNYCLSLFM6ZUYTML5EEQQE","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":"ebce7ad0af93bb9805624293dc873b9bb94970bb7c33ef42a091d1350a39467f","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T12:49:55Z","title_canon_sha256":"4c8e81f07f8b3b828559d7fb509ed38f6ad891d0104e0b084219830ac791dfd1"},"schema_version":"1.0","source":{"id":"1012.0724","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.0724","created_at":"2026-05-18T02:04:35Z"},{"alias_kind":"arxiv_version","alias_value":"1012.0724v1","created_at":"2026-05-18T02:04:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.0724","created_at":"2026-05-18T02:04:35Z"},{"alias_kind":"pith_short_12","alias_value":"YHWDKNYCLSLF","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"YHWDKNYCLSLFM6ZU","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"YHWDKNYC","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:cb92a7b79e78d148d3c730fe110aca9888500e285a2ccca237c306b8df0e6d85","target":"graph","created_at":"2026-05-18T02:04:35Z","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":"Gravitational instability plays an important role in driving gas accretion in massive protostellar discs. Particularly strong is the global gravitational instability, which arises when the disc mass is of order 0.1 of the mass of the central star and has a characteristic spatial scale much greater than the disc's vertical scale-height. In this paper we use three-dimensional numerical hydrodynamics to study the development of gravitational instabilities in a disc which is embedded in a dense, gaseous envelope. We find that global gravitational instabilities are the dominant mode of angular mome","authors_text":"((1) Leiden Observatory, 2), (2) University of Leicester, 3, (3) Lorentz Institute, 4), (4) Monash University), D. Harsono (1), R. D. Alexander (1, Yuri Levin (1","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T12:49:55Z","title":"Global Gravitational Instabilities in Discs with Infall"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.0724","kind":"arxiv","version":1},"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":"sha256:96d9f03c4b5bb5a7111280c7099650850f3bc932f0dd43a021bb6fab6224ecb3","target":"record","created_at":"2026-05-18T02:04:35Z","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":"ebce7ad0af93bb9805624293dc873b9bb94970bb7c33ef42a091d1350a39467f","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T12:49:55Z","title_canon_sha256":"4c8e81f07f8b3b828559d7fb509ed38f6ad891d0104e0b084219830ac791dfd1"},"schema_version":"1.0","source":{"id":"1012.0724","kind":"arxiv","version":1}},"canonical_sha256":"c1ec3537025c96567b34c4d8be9090810ccb30de2cc468a7a1a2425c43c28994","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c1ec3537025c96567b34c4d8be9090810ccb30de2cc468a7a1a2425c43c28994","first_computed_at":"2026-05-18T02:04:35.459473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:35.459473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XleWIZI05scnwV73ZJUQy/xWExpp5ZsZ2UnUK+88p+2TxJBIm8prHeU47K4k0fMSPCtiBtc6Fgp6dNyHIShkBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:35.460209Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.0724","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96d9f03c4b5bb5a7111280c7099650850f3bc932f0dd43a021bb6fab6224ecb3","sha256:cb92a7b79e78d148d3c730fe110aca9888500e285a2ccca237c306b8df0e6d85"],"state_sha256":"f64229b195f47644c80bcc119b6bf35b4124fdd9f80f375331ba7695fc9c1648"}