{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:33ITBQMDNZWTYDAP36MRAUPAAO","short_pith_number":"pith:33ITBQMD","canonical_record":{"source":{"id":"1304.1367","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-04T14:01:22Z","cross_cats_sorted":[],"title_canon_sha256":"c3770f0e427f80d20bfb11d2beb0cbf146cc8d67e3b2fabde3265d0f0c8e141d","abstract_canon_sha256":"07ada10e7cedde1d96298ea599723d093f9550aab58028ca4bec1033edb8f6f1"},"schema_version":"1.0"},"canonical_sha256":"ded130c1836e6d3c0c0fdf991051e00391bd801791c0d3e37aee8740157657f7","source":{"kind":"arxiv","id":"1304.1367","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.1367","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"arxiv_version","alias_value":"1304.1367v2","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.1367","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"pith_short_12","alias_value":"33ITBQMDNZWT","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"33ITBQMDNZWTYDAP","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"33ITBQMD","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:33ITBQMDNZWTYDAP36MRAUPAAO","target":"record","payload":{"canonical_record":{"source":{"id":"1304.1367","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-04T14:01:22Z","cross_cats_sorted":[],"title_canon_sha256":"c3770f0e427f80d20bfb11d2beb0cbf146cc8d67e3b2fabde3265d0f0c8e141d","abstract_canon_sha256":"07ada10e7cedde1d96298ea599723d093f9550aab58028ca4bec1033edb8f6f1"},"schema_version":"1.0"},"canonical_sha256":"ded130c1836e6d3c0c0fdf991051e00391bd801791c0d3e37aee8740157657f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:38.328851Z","signature_b64":"SS3Lm8ZWYZUIbdJgai9M+Ef5B9lOMbZgQjqG+bnVTyHEsGN9X2HlwsZPYHHCSyw2tPi14PpUPLZb9M4CPPZyBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ded130c1836e6d3c0c0fdf991051e00391bd801791c0d3e37aee8740157657f7","last_reissued_at":"2026-05-18T02:03:38.328062Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:38.328062Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.1367","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:03:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mes5KmIEQrm1+xUfsEkPZzbr3BnLXlYzF87yxwf3a2IKR3K4JYR7kuiTQhnw1WEOIHRVZykd44KOIgtMBB4iCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:51:20.898171Z"},"content_sha256":"cae3e52698d0b18c60879d9ad124894030061b6fe475e81460f0a8b207333492","schema_version":"1.0","event_id":"sha256:cae3e52698d0b18c60879d9ad124894030061b6fe475e81460f0a8b207333492"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:33ITBQMDNZWTYDAP36MRAUPAAO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Effects of Inhomogeneities within Colliding Flows on the Formation and Evolution of Molecular Clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Frank, Fabian Heitsch, Jonathan Carroll-Nellenback","submitted_at":"2013-04-04T14:01:22Z","abstract_excerpt":"Observational evidence from local star-forming regions mandates that star formation occurs shortly after, or even during, molecular cloud formation. Models of the formation of molecular clouds in large-scale converging flows have identified the physical mechanisms driving the necessary rapid fragmentation. They also point to global gravitational collapse driving supersonic turbulence in molecular clouds. Previous cloud formation models have focused on turbulence generation, gravitational collapse, magnetic fields, and feedback. Here, we explore the effect of structure in the flow on the result"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.1367","kind":"arxiv","version":2},"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":"2026-05-18T02:03:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nBrq8zDurgAsAKiCp0K/u2eyMsm9bxqGFkdzHthqizWEzOyxFdhI974eKPFSanparMf1TYN00HMo4U7v0Uv7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:51:20.898526Z"},"content_sha256":"9d8c90f01afea8595c3d0c446dd6f812457b8fde585947b006bb75e8defc0542","schema_version":"1.0","event_id":"sha256:9d8c90f01afea8595c3d0c446dd6f812457b8fde585947b006bb75e8defc0542"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/33ITBQMDNZWTYDAP36MRAUPAAO/bundle.json","state_url":"https://pith.science/pith/33ITBQMDNZWTYDAP36MRAUPAAO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/33ITBQMDNZWTYDAP36MRAUPAAO/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":"2026-06-02T22:51:20Z","links":{"resolver":"https://pith.science/pith/33ITBQMDNZWTYDAP36MRAUPAAO","bundle":"https://pith.science/pith/33ITBQMDNZWTYDAP36MRAUPAAO/bundle.json","state":"https://pith.science/pith/33ITBQMDNZWTYDAP36MRAUPAAO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/33ITBQMDNZWTYDAP36MRAUPAAO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:33ITBQMDNZWTYDAP36MRAUPAAO","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":"07ada10e7cedde1d96298ea599723d093f9550aab58028ca4bec1033edb8f6f1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-04T14:01:22Z","title_canon_sha256":"c3770f0e427f80d20bfb11d2beb0cbf146cc8d67e3b2fabde3265d0f0c8e141d"},"schema_version":"1.0","source":{"id":"1304.1367","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.1367","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"arxiv_version","alias_value":"1304.1367v2","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.1367","created_at":"2026-05-18T02:03:38Z"},{"alias_kind":"pith_short_12","alias_value":"33ITBQMDNZWT","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"33ITBQMDNZWTYDAP","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"33ITBQMD","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:9d8c90f01afea8595c3d0c446dd6f812457b8fde585947b006bb75e8defc0542","target":"graph","created_at":"2026-05-18T02:03:38Z","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":"Observational evidence from local star-forming regions mandates that star formation occurs shortly after, or even during, molecular cloud formation. Models of the formation of molecular clouds in large-scale converging flows have identified the physical mechanisms driving the necessary rapid fragmentation. They also point to global gravitational collapse driving supersonic turbulence in molecular clouds. Previous cloud formation models have focused on turbulence generation, gravitational collapse, magnetic fields, and feedback. Here, we explore the effect of structure in the flow on the result","authors_text":"Adam Frank, Fabian Heitsch, Jonathan Carroll-Nellenback","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-04T14:01:22Z","title":"The Effects of Inhomogeneities within Colliding Flows on the Formation and Evolution of Molecular Clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.1367","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:cae3e52698d0b18c60879d9ad124894030061b6fe475e81460f0a8b207333492","target":"record","created_at":"2026-05-18T02:03:38Z","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":"07ada10e7cedde1d96298ea599723d093f9550aab58028ca4bec1033edb8f6f1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-04T14:01:22Z","title_canon_sha256":"c3770f0e427f80d20bfb11d2beb0cbf146cc8d67e3b2fabde3265d0f0c8e141d"},"schema_version":"1.0","source":{"id":"1304.1367","kind":"arxiv","version":2}},"canonical_sha256":"ded130c1836e6d3c0c0fdf991051e00391bd801791c0d3e37aee8740157657f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ded130c1836e6d3c0c0fdf991051e00391bd801791c0d3e37aee8740157657f7","first_computed_at":"2026-05-18T02:03:38.328062Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:38.328062Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SS3Lm8ZWYZUIbdJgai9M+Ef5B9lOMbZgQjqG+bnVTyHEsGN9X2HlwsZPYHHCSyw2tPi14PpUPLZb9M4CPPZyBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:38.328851Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.1367","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cae3e52698d0b18c60879d9ad124894030061b6fe475e81460f0a8b207333492","sha256:9d8c90f01afea8595c3d0c446dd6f812457b8fde585947b006bb75e8defc0542"],"state_sha256":"5be60e72588e841230f74c6780b82abf27e7daf29c61f3e74e25070883a594be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kZjRZMXrMX+4hPOJPKlk3cfCCRMQoctO8Zt2OLjcEHQmpw37Pc8bHKzniBY+6n1ul2wWRqMf7b+A/aftwR9HBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T22:51:20.900396Z","bundle_sha256":"69b726c0789dbe29fbf30133e26cc7ef455ce9fd3cf8b9d7c7e422abfe15cc75"}}