{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:NQ2QHGK4WIKOVDLM2UNF6ZQRJD","short_pith_number":"pith:NQ2QHGK4","schema_version":"1.0","canonical_sha256":"6c3503995cb214ea8d6cd51a5f661148d4f28c6b72d8e6b25d6e846359ea37d5","source":{"kind":"arxiv","id":"1006.3236","version":2},"attestation_state":"computed","paper":{"title":"Tracing early evolutionary stages of high-mass star formation with molecular lines","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"F.F.S. van der Tak, F. Herpin, M.G. Marseille, T. Jacq","submitted_at":"2010-06-16T14:33:38Z","abstract_excerpt":"Despite its major role in the evolution of the interstellar medium, the formation of high-mass stars (M > 10 Msol) is still poorly understood. Two types of massive star cluster precursors, the so-called Massive Dense Cores (MDCs), have been observed, which differ in their mid-infrared brightness. The origin of this difference is not established and could be the result of evolution, density, geometry differences, or a combination of these. We compare several molecular tracers of physical conditions (hot cores, shocks) observed in a sample of mid-IR weak emitting MDCs with previous results obtai"},"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":"1006.3236","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-16T14:33:38Z","cross_cats_sorted":[],"title_canon_sha256":"40ac13eada3bc9076d723807411781a0756cd7ef5eac23afe2296dae5b70308b","abstract_canon_sha256":"e0e9bc66508a1e9c91889a62419038d8385972af02f148d617f35d0af87beda5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:45.486550Z","signature_b64":"y9pJvSfVQuLxmsDyO8BUE8gZi/5nhSvFO0vnhmAKCLEDb/fB6WxIR4D6bgcULl2AHw5cvXfhC8/gY54+G93+Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c3503995cb214ea8d6cd51a5f661148d4f28c6b72d8e6b25d6e846359ea37d5","last_reissued_at":"2026-05-18T02:06:45.485777Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:45.485777Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tracing early evolutionary stages of high-mass star formation with molecular lines","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"F.F.S. van der Tak, F. Herpin, M.G. Marseille, T. Jacq","submitted_at":"2010-06-16T14:33:38Z","abstract_excerpt":"Despite its major role in the evolution of the interstellar medium, the formation of high-mass stars (M > 10 Msol) is still poorly understood. Two types of massive star cluster precursors, the so-called Massive Dense Cores (MDCs), have been observed, which differ in their mid-infrared brightness. The origin of this difference is not established and could be the result of evolution, density, geometry differences, or a combination of these. We compare several molecular tracers of physical conditions (hot cores, shocks) observed in a sample of mid-IR weak emitting MDCs with previous results obtai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.3236","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1006.3236","created_at":"2026-05-18T02:06:45.485893+00:00"},{"alias_kind":"arxiv_version","alias_value":"1006.3236v2","created_at":"2026-05-18T02:06:45.485893+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.3236","created_at":"2026-05-18T02:06:45.485893+00:00"},{"alias_kind":"pith_short_12","alias_value":"NQ2QHGK4WIKO","created_at":"2026-05-18T12:26:10.704358+00:00"},{"alias_kind":"pith_short_16","alias_value":"NQ2QHGK4WIKOVDLM","created_at":"2026-05-18T12:26:10.704358+00:00"},{"alias_kind":"pith_short_8","alias_value":"NQ2QHGK4","created_at":"2026-05-18T12:26:10.704358+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD","json":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD.json","graph_json":"https://pith.science/api/pith-number/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/graph.json","events_json":"https://pith.science/api/pith-number/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/events.json","paper":"https://pith.science/paper/NQ2QHGK4"},"agent_actions":{"view_html":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD","download_json":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD.json","view_paper":"https://pith.science/paper/NQ2QHGK4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1006.3236&json=true","fetch_graph":"https://pith.science/api/pith-number/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/graph.json","fetch_events":"https://pith.science/api/pith-number/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/action/storage_attestation","attest_author":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/action/author_attestation","sign_citation":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/action/citation_signature","submit_replication":"https://pith.science/pith/NQ2QHGK4WIKOVDLM2UNF6ZQRJD/action/replication_record"}},"created_at":"2026-05-18T02:06:45.485893+00:00","updated_at":"2026-05-18T02:06:45.485893+00:00"}