{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:E4EFQNFLASAPLW4ZD52H7CTJRP","short_pith_number":"pith:E4EFQNFL","schema_version":"1.0","canonical_sha256":"27085834ab0480f5db991f747f8a698bec9fe4667168fa3e29514a3c02045597","source":{"kind":"arxiv","id":"0908.3546","version":1},"attestation_state":"computed","paper":{"title":"N-Body Simulation of Planetesimal Formation through Gravitational Instability and Coagulation. II. Accretion Model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Eiichiro Kokubo, Shugo Michikoshi, Shu-ichiro Inutsuka","submitted_at":"2009-08-25T06:40:44Z","abstract_excerpt":"The gravitational instability of a dust layer is one of the scenarios for planetesimal formation. If the density of a dust layer becomes sufficiently high as a result of the sedimentation of dust grains toward the midplane of a protoplanetary disk, the layer becomes gravitationally unstable and spontaneously fragments into planetesimals. Using a shearing box method, we performed local $N$-body simulations of gravitational instability of a dust layer and subsequent coagulation without gas and investigated the basic formation process of planetesimals. In this paper, we adopted the accretion mode"},"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":"0908.3546","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-08-25T06:40:44Z","cross_cats_sorted":[],"title_canon_sha256":"02005a584e091308f2eba6368d94d5b1f6cdaf0cbd542114d7feab96e4da52e4","abstract_canon_sha256":"d27716158aaa24ad45c128526464de4e8bb2678ff350ea7dbe4e5daee38be6b9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:23.349164Z","signature_b64":"PWKTasIEQhpfT86vlPJO2B7W/XyGFhSW8d9/sxpDcXFoHf7eBQDgDbey6Q8JpzxMO6LE9/5up3unx0VhNMCuAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"27085834ab0480f5db991f747f8a698bec9fe4667168fa3e29514a3c02045597","last_reissued_at":"2026-05-18T02:12:23.348387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:23.348387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"N-Body Simulation of Planetesimal Formation through Gravitational Instability and Coagulation. II. Accretion Model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Eiichiro Kokubo, Shugo Michikoshi, Shu-ichiro Inutsuka","submitted_at":"2009-08-25T06:40:44Z","abstract_excerpt":"The gravitational instability of a dust layer is one of the scenarios for planetesimal formation. If the density of a dust layer becomes sufficiently high as a result of the sedimentation of dust grains toward the midplane of a protoplanetary disk, the layer becomes gravitationally unstable and spontaneously fragments into planetesimals. Using a shearing box method, we performed local $N$-body simulations of gravitational instability of a dust layer and subsequent coagulation without gas and investigated the basic formation process of planetesimals. In this paper, we adopted the accretion mode"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.3546","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":"0908.3546","created_at":"2026-05-18T02:12:23.348515+00:00"},{"alias_kind":"arxiv_version","alias_value":"0908.3546v1","created_at":"2026-05-18T02:12:23.348515+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.3546","created_at":"2026-05-18T02:12:23.348515+00:00"},{"alias_kind":"pith_short_12","alias_value":"E4EFQNFLASAP","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"E4EFQNFLASAPLW4Z","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"E4EFQNFL","created_at":"2026-05-18T12:25:59.703012+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/E4EFQNFLASAPLW4ZD52H7CTJRP","json":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP.json","graph_json":"https://pith.science/api/pith-number/E4EFQNFLASAPLW4ZD52H7CTJRP/graph.json","events_json":"https://pith.science/api/pith-number/E4EFQNFLASAPLW4ZD52H7CTJRP/events.json","paper":"https://pith.science/paper/E4EFQNFL"},"agent_actions":{"view_html":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP","download_json":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP.json","view_paper":"https://pith.science/paper/E4EFQNFL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0908.3546&json=true","fetch_graph":"https://pith.science/api/pith-number/E4EFQNFLASAPLW4ZD52H7CTJRP/graph.json","fetch_events":"https://pith.science/api/pith-number/E4EFQNFLASAPLW4ZD52H7CTJRP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP/action/storage_attestation","attest_author":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP/action/author_attestation","sign_citation":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP/action/citation_signature","submit_replication":"https://pith.science/pith/E4EFQNFLASAPLW4ZD52H7CTJRP/action/replication_record"}},"created_at":"2026-05-18T02:12:23.348515+00:00","updated_at":"2026-05-18T02:12:23.348515+00:00"}