{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:X3KK7LGAYGBCXUTIRFLPQZHA2N","short_pith_number":"pith:X3KK7LGA","canonical_record":{"source":{"id":"1307.1747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-06T04:40:41Z","cross_cats_sorted":[],"title_canon_sha256":"a23a0003d0c6b870289a3e3d395183e62e22644b4714f21c63d9ee37daf88d8f","abstract_canon_sha256":"67ac797c09b40036dafc1fd41f0609b205603cac78d62139d420d15750aa978b"},"schema_version":"1.0"},"canonical_sha256":"bed4afacc0c1822bd2688956f864e0d36cdf1bded8fc25c537b6d7c2c51dd57f","source":{"kind":"arxiv","id":"1307.1747","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1747","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1747v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1747","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"X3KK7LGAYGBC","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"X3KK7LGAYGBCXUTI","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"X3KK7LGA","created_at":"2026-05-18T12:28:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:X3KK7LGAYGBCXUTIRFLPQZHA2N","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-06T04:40:41Z","cross_cats_sorted":[],"title_canon_sha256":"a23a0003d0c6b870289a3e3d395183e62e22644b4714f21c63d9ee37daf88d8f","abstract_canon_sha256":"67ac797c09b40036dafc1fd41f0609b205603cac78d62139d420d15750aa978b"},"schema_version":"1.0"},"canonical_sha256":"bed4afacc0c1822bd2688956f864e0d36cdf1bded8fc25c537b6d7c2c51dd57f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:59.170251Z","signature_b64":"ugW6OmWHsfLI4er70uifP0AEBshARHXHlSd7chw7XgpMQfjbf0j9fCxVH1kVnWTQKUKoEqMC+KXnr21Er2KkBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bed4afacc0c1822bd2688956f864e0d36cdf1bded8fc25c537b6d7c2c51dd57f","last_reissued_at":"2026-05-18T01:48:59.169734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:59.169734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1747","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wgFEUle18wn4nVrXA6xGX3Lvze8QTCuvQge7AyFr3/KolG5DCNwEC7ZWDaWl4LRALLSUCOgUd/K2OvPrZurvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:10:34.633055Z"},"content_sha256":"d59ac763d63e88c581561406bd0a8a1befd5a12c95eb30d8d1ba05e27889f6e2","schema_version":"1.0","event_id":"sha256:d59ac763d63e88c581561406bd0a8a1befd5a12c95eb30d8d1ba05e27889f6e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:X3KK7LGAYGBCXUTIRFLPQZHA2N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Conditions for Circumstellar Disk Formation: Effects of Initial Conditions and Sink Treatment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Masahiro N. Machida, Shu-ichiro Inutsuka, Tomoaki Matsumoto","submitted_at":"2013-07-06T04:40:41Z","abstract_excerpt":"The formation of a circumstellar disk in collapsing cloud cores is investigated with three-dimensional magnetohydrodynamic simulations. We prepare four types of initial cloud having different density profiles and calculate their evolution with or without a sink. To investigate the effect of magnetic dissipation on disk formation, the Ohmic dissipation is considered in some models. Calculations show that disk formation is very sensitive to both the initial cloud configuration and the sink treatment. The disk size considerably differs in clouds with different density profiles even when the initi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1747","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BjUXUqXQfAM5bnDohNAmKGTnewdzkUgV3cmN5+v/Rh/sgVx0K12hHOgmjmUVrb1v4cWIYYwUD45C/8n8z9h1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:10:34.633678Z"},"content_sha256":"efe271a2a06fed878f155ba9435ece671b9d7564ccc4f8aabe308530f6f509ae","schema_version":"1.0","event_id":"sha256:efe271a2a06fed878f155ba9435ece671b9d7564ccc4f8aabe308530f6f509ae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/bundle.json","state_url":"https://pith.science/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T01:10:34Z","links":{"resolver":"https://pith.science/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N","bundle":"https://pith.science/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/bundle.json","state":"https://pith.science/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3KK7LGAYGBCXUTIRFLPQZHA2N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:X3KK7LGAYGBCXUTIRFLPQZHA2N","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":"67ac797c09b40036dafc1fd41f0609b205603cac78d62139d420d15750aa978b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-06T04:40:41Z","title_canon_sha256":"a23a0003d0c6b870289a3e3d395183e62e22644b4714f21c63d9ee37daf88d8f"},"schema_version":"1.0","source":{"id":"1307.1747","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1747","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1747v1","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1747","created_at":"2026-05-18T01:48:59Z"},{"alias_kind":"pith_short_12","alias_value":"X3KK7LGAYGBC","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"X3KK7LGAYGBCXUTI","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"X3KK7LGA","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:efe271a2a06fed878f155ba9435ece671b9d7564ccc4f8aabe308530f6f509ae","target":"graph","created_at":"2026-05-18T01:48:59Z","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":"The formation of a circumstellar disk in collapsing cloud cores is investigated with three-dimensional magnetohydrodynamic simulations. We prepare four types of initial cloud having different density profiles and calculate their evolution with or without a sink. To investigate the effect of magnetic dissipation on disk formation, the Ohmic dissipation is considered in some models. Calculations show that disk formation is very sensitive to both the initial cloud configuration and the sink treatment. The disk size considerably differs in clouds with different density profiles even when the initi","authors_text":"Masahiro N. Machida, Shu-ichiro Inutsuka, Tomoaki Matsumoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-06T04:40:41Z","title":"Conditions for Circumstellar Disk Formation: Effects of Initial Conditions and Sink Treatment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1747","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:d59ac763d63e88c581561406bd0a8a1befd5a12c95eb30d8d1ba05e27889f6e2","target":"record","created_at":"2026-05-18T01:48:59Z","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":"67ac797c09b40036dafc1fd41f0609b205603cac78d62139d420d15750aa978b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-06T04:40:41Z","title_canon_sha256":"a23a0003d0c6b870289a3e3d395183e62e22644b4714f21c63d9ee37daf88d8f"},"schema_version":"1.0","source":{"id":"1307.1747","kind":"arxiv","version":1}},"canonical_sha256":"bed4afacc0c1822bd2688956f864e0d36cdf1bded8fc25c537b6d7c2c51dd57f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bed4afacc0c1822bd2688956f864e0d36cdf1bded8fc25c537b6d7c2c51dd57f","first_computed_at":"2026-05-18T01:48:59.169734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:59.169734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ugW6OmWHsfLI4er70uifP0AEBshARHXHlSd7chw7XgpMQfjbf0j9fCxVH1kVnWTQKUKoEqMC+KXnr21Er2KkBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:59.170251Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1747","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d59ac763d63e88c581561406bd0a8a1befd5a12c95eb30d8d1ba05e27889f6e2","sha256:efe271a2a06fed878f155ba9435ece671b9d7564ccc4f8aabe308530f6f509ae"],"state_sha256":"6ecee0de097c3a5862799bab9dfa9a7d97f97f85864f296d909f72f876d5d029"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mjkh1l4Gi88NwYeTQ9sNnjZCJGgmzfMqsUE/M+Js2aAD2HzcHxV5rxepjNOfYH+k1bVyfKMe8ZlcPtmmlFUyAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T01:10:34.636946Z","bundle_sha256":"9a92e3da22f27efa356eebd1300622583a784f3e427468d255cd2347898e1131"}}