{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:3Z3KFTTMZLQC2FEVLIDYHXIFUH","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":"fb49ee5a3f779a731e1f2a85c0b0d57c9b86c6e180dead18d12d35ab78ce827b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-17T20:05:29Z","title_canon_sha256":"811f1e5844e83095469a7a900359cb7372e783bd04dd5876327791d3f3923114"},"schema_version":"1.0","source":{"id":"1304.4950","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.4950","created_at":"2026-05-18T01:50:31Z"},{"alias_kind":"arxiv_version","alias_value":"1304.4950v2","created_at":"2026-05-18T01:50:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4950","created_at":"2026-05-18T01:50:31Z"},{"alias_kind":"pith_short_12","alias_value":"3Z3KFTTMZLQC","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3Z3KFTTMZLQC2FEV","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3Z3KFTTM","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:3696486e1d571a3cf477f30b452bea58745d24eb2711a9f9df48f517206fb7cf","target":"graph","created_at":"2026-05-18T01:50:31Z","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":"Observations of atomic or molecular lines can provide important information about the physical state of star forming regions. In order to investigate the line profiles from dynamical collapsing massive star forming regions (MSFRs), we model the emission from hydrodynamic simulations of a collapsing cloud in the absence of outflows. By performing radiative transfer calculations, we compute the optically thick HCO+ and optically thin N2H+ line profiles from two collapsing regions at different epochs. Due to large-scale collapse, the MSFRs have large velocity gradients, reaching up to 20 km/s/pc ","authors_text":"Henrik Beuther, Ian A. Bonnell, Rahul Shetty, Ralf S. Klessen, Rowan J. Smith","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-17T20:05:29Z","title":"Line Profiles of Cores within Clusters: II Signatures of Dynamical Collapse during High Mass Star Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4950","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":"sha256:84021e62e4d220dcc333d1f5c9352ee19b084bffa2e4002db5d4d6e56cc08bdd","target":"record","created_at":"2026-05-18T01:50:31Z","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":"fb49ee5a3f779a731e1f2a85c0b0d57c9b86c6e180dead18d12d35ab78ce827b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-17T20:05:29Z","title_canon_sha256":"811f1e5844e83095469a7a900359cb7372e783bd04dd5876327791d3f3923114"},"schema_version":"1.0","source":{"id":"1304.4950","kind":"arxiv","version":2}},"canonical_sha256":"de76a2ce6ccae02d14955a0783dd05a1dcc45d35ef0e484cddf4fcbd59c0d696","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de76a2ce6ccae02d14955a0783dd05a1dcc45d35ef0e484cddf4fcbd59c0d696","first_computed_at":"2026-05-18T01:50:31.417760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:31.417760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7lNiPBebwBUXv2JdQ5YAmcG3ge/Qg/eSaZUg4G180f4midI1+zR2LXxIroBbpp3bKGyiYP6Xbtxixt4ynQCjCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:31.418350Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.4950","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:84021e62e4d220dcc333d1f5c9352ee19b084bffa2e4002db5d4d6e56cc08bdd","sha256:3696486e1d571a3cf477f30b452bea58745d24eb2711a9f9df48f517206fb7cf"],"state_sha256":"509bc087b18386ad6f00a3a44921c846f54ca9dd3a0bdb956be8ee275610473f"}