{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:I6JLEHDO2RILXEFGPGYSY2MA7P","short_pith_number":"pith:I6JLEHDO","schema_version":"1.0","canonical_sha256":"4792b21c6ed450bb90a679b12c6980fbf7d46db689ecd02980ec70bf31e4576f","source":{"kind":"arxiv","id":"2307.11162","version":2},"attestation_state":"computed","paper":{"title":"Filament fragmentation: Density gradients suppress end dominated collapse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andreas Burkert, Elena Hoemann, Stefan Heigl","submitted_at":"2023-07-20T18:00:08Z","abstract_excerpt":"The onset of star formation is set by the collapse of filaments in the interstellar medium. From a theoretical point of view, an isolated cylindrical filament forms cores via the edge effect. Due to the self-gravity of a filament, the strong increase in acceleration at both ends leads to a pile-up of matter which collapses into cores. However, this effect is rarely observed. Most theoretical models consider a sharp density cut-off at the edge of the filament, whereas a smoother transition is more realistic and would also decrease the acceleration at the ends of the filament. We show that the e"},"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":"2307.11162","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-07-20T18:00:08Z","cross_cats_sorted":[],"title_canon_sha256":"7539c7c4801bb78c2fdad1cf6a15add109e61fde85ba38cbdca98ae1b3b1036c","abstract_canon_sha256":"6643e54a7251cbbeef41aad7c4ecfc7eb2a7576d82592b86e2a06e58241ad0a5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:48:24.071612Z","signature_b64":"q7GRifsxNAE7roKqUpAbutRWFWwpHCWORJF4QDc6TCZlIQKaC09ZOUSIEqrX+VHfcLj0yMslqHEPrpYkg8xmAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4792b21c6ed450bb90a679b12c6980fbf7d46db689ecd02980ec70bf31e4576f","last_reissued_at":"2026-07-05T06:48:24.071224Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:48:24.071224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Filament fragmentation: Density gradients suppress end dominated collapse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andreas Burkert, Elena Hoemann, Stefan Heigl","submitted_at":"2023-07-20T18:00:08Z","abstract_excerpt":"The onset of star formation is set by the collapse of filaments in the interstellar medium. From a theoretical point of view, an isolated cylindrical filament forms cores via the edge effect. Due to the self-gravity of a filament, the strong increase in acceleration at both ends leads to a pile-up of matter which collapses into cores. However, this effect is rarely observed. Most theoretical models consider a sharp density cut-off at the edge of the filament, whereas a smoother transition is more realistic and would also decrease the acceleration at the ends of the filament. We show that the e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11162","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2307.11162/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2307.11162","created_at":"2026-07-05T06:48:24.071277+00:00"},{"alias_kind":"arxiv_version","alias_value":"2307.11162v2","created_at":"2026-07-05T06:48:24.071277+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.11162","created_at":"2026-07-05T06:48:24.071277+00:00"},{"alias_kind":"pith_short_12","alias_value":"I6JLEHDO2RIL","created_at":"2026-07-05T06:48:24.071277+00:00"},{"alias_kind":"pith_short_16","alias_value":"I6JLEHDO2RILXEFG","created_at":"2026-07-05T06:48:24.071277+00:00"},{"alias_kind":"pith_short_8","alias_value":"I6JLEHDO","created_at":"2026-07-05T06:48:24.071277+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.04797","citing_title":"Sutra : An integrated framework for identification and characterization of filaments in the interstellar medium","ref_index":30,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P","json":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P.json","graph_json":"https://pith.science/api/pith-number/I6JLEHDO2RILXEFGPGYSY2MA7P/graph.json","events_json":"https://pith.science/api/pith-number/I6JLEHDO2RILXEFGPGYSY2MA7P/events.json","paper":"https://pith.science/paper/I6JLEHDO"},"agent_actions":{"view_html":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P","download_json":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P.json","view_paper":"https://pith.science/paper/I6JLEHDO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2307.11162&json=true","fetch_graph":"https://pith.science/api/pith-number/I6JLEHDO2RILXEFGPGYSY2MA7P/graph.json","fetch_events":"https://pith.science/api/pith-number/I6JLEHDO2RILXEFGPGYSY2MA7P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P/action/storage_attestation","attest_author":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P/action/author_attestation","sign_citation":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P/action/citation_signature","submit_replication":"https://pith.science/pith/I6JLEHDO2RILXEFGPGYSY2MA7P/action/replication_record"}},"created_at":"2026-07-05T06:48:24.071277+00:00","updated_at":"2026-07-05T06:48:24.071277+00:00"}