{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:MFZEPWAHN6IJFPRKAH3VVEGMN3","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":"821249b652cd7462438fb9698de4ab22638f5da62504a0ad58185f8d27330f4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-09-15T20:00:51Z","title_canon_sha256":"d40b62f7ec654dbc3c35f9f1a94de0ac15c900f1211f25dad6ff1b20e9d1a372"},"schema_version":"1.0","source":{"id":"1409.4430","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4430","created_at":"2026-05-18T01:42:02Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4430v2","created_at":"2026-05-18T01:42:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4430","created_at":"2026-05-18T01:42:02Z"},{"alias_kind":"pith_short_12","alias_value":"MFZEPWAHN6IJ","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"MFZEPWAHN6IJFPRK","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"MFZEPWAH","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:c27c0695de0cfeba491da3d8d98ebf661df3f3cbf663decd3f62e925e5f9dec9","target":"graph","created_at":"2026-05-18T01:42:02Z","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":"Though ~10 Earth mass rocky/icy cores are commonly held as a prerequisite for the formation of gas giants, theoretical models still struggle to explain how these embryos can form within the lifetimes of gaseous circumstellar disks. In recent years, aerodynamic-aided accretion of \"pebbles,\" objects ranging from centimeters to meters in size, has been suggested as a potential solution to this long-standing problem. While pebble accretion has been demonstrated to be extremely effective in local simulations that look at the detailed behavior of these pebbles in the vicinity of a single planetary e","authors_text":"H. F. Levison, K. A. Kretke","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-09-15T20:00:51Z","title":"Challenges in Forming the Solar System's Giant Planet Cores via Pebble Accretion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4430","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":"sha256:94e9985aaf246b5aac87d92f83629823b2f31c2b051cfe3c5c12c5a518f0dd52","target":"record","created_at":"2026-05-18T01:42:02Z","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":"821249b652cd7462438fb9698de4ab22638f5da62504a0ad58185f8d27330f4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-09-15T20:00:51Z","title_canon_sha256":"d40b62f7ec654dbc3c35f9f1a94de0ac15c900f1211f25dad6ff1b20e9d1a372"},"schema_version":"1.0","source":{"id":"1409.4430","kind":"arxiv","version":2}},"canonical_sha256":"617247d8076f9092be2a01f75a90cc6ee4f0565d5589ecacb856e8841ffe164c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"617247d8076f9092be2a01f75a90cc6ee4f0565d5589ecacb856e8841ffe164c","first_computed_at":"2026-05-18T01:42:02.428438Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:02.428438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4duicKtUBD8HE89YWAaf29/umq9WIFPi+eBOIl1P1jf03s0TNV+fOWfbHR8o4yiQ76IgsnVIcZPT0hiM8KUbDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:02.428927Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.4430","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94e9985aaf246b5aac87d92f83629823b2f31c2b051cfe3c5c12c5a518f0dd52","sha256:c27c0695de0cfeba491da3d8d98ebf661df3f3cbf663decd3f62e925e5f9dec9"],"state_sha256":"74bb49c91913709a031cea38f9f354de75306ed3a00bc5a31578c53cca86f062"}