{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:3GNR66PSUQLA5YA2TBLEZY2PK4","short_pith_number":"pith:3GNR66PS","canonical_record":{"source":{"id":"1510.04293","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-14T20:19:22Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c6a02d2992f464ed4ea75654c3689c478df92f4021d2cc5a1ff662b701ae6cfe","abstract_canon_sha256":"e63e505ddee019947a93d583022c996aef9d6d4a394c92d1de85390f906d9d38"},"schema_version":"1.0"},"canonical_sha256":"d99b1f79f2a4160ee01a98564ce34f571ddef4ffbf9a3c185ffb35ff2d925e35","source":{"kind":"arxiv","id":"1510.04293","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04293","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04293v1","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04293","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"pith_short_12","alias_value":"3GNR66PSUQLA","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"3GNR66PSUQLA5YA2","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"3GNR66PS","created_at":"2026-05-18T12:29:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:3GNR66PSUQLA5YA2TBLEZY2PK4","target":"record","payload":{"canonical_record":{"source":{"id":"1510.04293","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-14T20:19:22Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c6a02d2992f464ed4ea75654c3689c478df92f4021d2cc5a1ff662b701ae6cfe","abstract_canon_sha256":"e63e505ddee019947a93d583022c996aef9d6d4a394c92d1de85390f906d9d38"},"schema_version":"1.0"},"canonical_sha256":"d99b1f79f2a4160ee01a98564ce34f571ddef4ffbf9a3c185ffb35ff2d925e35","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:20.730557Z","signature_b64":"e6Sws3qnCup3fQt8OOeun/3u4222t7a8d8rwTZ9xgCztgzV1NUwnQqb8qHZB01HQtO2sPM7fcIup/W5nmSXKBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d99b1f79f2a4160ee01a98564ce34f571ddef4ffbf9a3c185ffb35ff2d925e35","last_reissued_at":"2026-05-18T00:54:20.730209Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:20.730209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.04293","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":"2026-05-18T00:54:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YA3nSpr4FfLZOuG+eL7OPzOFdiWp1UIgUYmvntsVDe+zS26uEmfVdRUhGVQrCk/d2dzpeb1KLJMs6VXJq2FVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T08:17:46.627405Z"},"content_sha256":"45bd7431c728c7b81e23e91334a044f52e2013a1b781def31e9c8d552244cfc3","schema_version":"1.0","event_id":"sha256:45bd7431c728c7b81e23e91334a044f52e2013a1b781def31e9c8d552244cfc3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:3GNR66PSUQLA5YA2TBLEZY2PK4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How can young massive clusters reach their present-day sizes?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Pavel Kroupa, Sambaran Banerjee","submitted_at":"2015-10-14T20:19:22Z","abstract_excerpt":"The classic question that how young massive star clusters attain their shapes and sizes, as we find them today, remains to be a challenge. Both observational and computational studies of star-forming massive molecular gas clouds infer that massive cluster formation is primarily triggered along the small-scale ($\\lesssim0.3$ pc) filamentary substructures within the clouds. The present study is intended to investigate the possible ways in which a filament-like-compact, massive star cluster (effective radius 0.1-0.3 pc) can expand $\\gtrsim10$ times, still remaining massive enough ($\\gtrsim10^4 M_"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04293","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":"2026-05-18T00:54:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l2doaTyg3BwEwjcTf0jcQ07/fVFJABqNqm6Ahbhz/PRFs9kyQk0+QxIzkI859iZq8TFnr0rUMLKHyO+h1RgyBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T08:17:46.627746Z"},"content_sha256":"663bf805b8405b86fece2c8ba634a624c898e97340d725d185faee2388273278","schema_version":"1.0","event_id":"sha256:663bf805b8405b86fece2c8ba634a624c898e97340d725d185faee2388273278"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/bundle.json","state_url":"https://pith.science/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/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":"2026-06-28T08:17:46Z","links":{"resolver":"https://pith.science/pith/3GNR66PSUQLA5YA2TBLEZY2PK4","bundle":"https://pith.science/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/bundle.json","state":"https://pith.science/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3GNR66PSUQLA5YA2TBLEZY2PK4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:3GNR66PSUQLA5YA2TBLEZY2PK4","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":"e63e505ddee019947a93d583022c996aef9d6d4a394c92d1de85390f906d9d38","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-14T20:19:22Z","title_canon_sha256":"c6a02d2992f464ed4ea75654c3689c478df92f4021d2cc5a1ff662b701ae6cfe"},"schema_version":"1.0","source":{"id":"1510.04293","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04293","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04293v1","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04293","created_at":"2026-05-18T00:54:20Z"},{"alias_kind":"pith_short_12","alias_value":"3GNR66PSUQLA","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"3GNR66PSUQLA5YA2","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"3GNR66PS","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:663bf805b8405b86fece2c8ba634a624c898e97340d725d185faee2388273278","target":"graph","created_at":"2026-05-18T00:54:20Z","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 classic question that how young massive star clusters attain their shapes and sizes, as we find them today, remains to be a challenge. Both observational and computational studies of star-forming massive molecular gas clouds infer that massive cluster formation is primarily triggered along the small-scale ($\\lesssim0.3$ pc) filamentary substructures within the clouds. The present study is intended to investigate the possible ways in which a filament-like-compact, massive star cluster (effective radius 0.1-0.3 pc) can expand $\\gtrsim10$ times, still remaining massive enough ($\\gtrsim10^4 M_","authors_text":"Pavel Kroupa, Sambaran Banerjee","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-14T20:19:22Z","title":"How can young massive clusters reach their present-day sizes?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04293","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":"sha256:45bd7431c728c7b81e23e91334a044f52e2013a1b781def31e9c8d552244cfc3","target":"record","created_at":"2026-05-18T00:54:20Z","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":"e63e505ddee019947a93d583022c996aef9d6d4a394c92d1de85390f906d9d38","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-14T20:19:22Z","title_canon_sha256":"c6a02d2992f464ed4ea75654c3689c478df92f4021d2cc5a1ff662b701ae6cfe"},"schema_version":"1.0","source":{"id":"1510.04293","kind":"arxiv","version":1}},"canonical_sha256":"d99b1f79f2a4160ee01a98564ce34f571ddef4ffbf9a3c185ffb35ff2d925e35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d99b1f79f2a4160ee01a98564ce34f571ddef4ffbf9a3c185ffb35ff2d925e35","first_computed_at":"2026-05-18T00:54:20.730209Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:20.730209Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e6Sws3qnCup3fQt8OOeun/3u4222t7a8d8rwTZ9xgCztgzV1NUwnQqb8qHZB01HQtO2sPM7fcIup/W5nmSXKBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:20.730557Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.04293","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45bd7431c728c7b81e23e91334a044f52e2013a1b781def31e9c8d552244cfc3","sha256:663bf805b8405b86fece2c8ba634a624c898e97340d725d185faee2388273278"],"state_sha256":"98e52bb881e401af1e014d21a69f85773ecfdf289a89bf4256ed99a833e49c46"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nLYFUHMyRAMKFd2tuEmzyfsRQYrRQdYSKcr0ugtJw8mEonHgZ6e3I4vD67YEl03FRpyA5RcCmhTD5awHFVuUDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T08:17:46.629542Z","bundle_sha256":"8cd3417602f7ce940c0c92897e9c5aab29e832350a4c39c792759ed2173d7062"}}