{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:KIW6BHE7KLJMUGWEUZRFPVBCNB","short_pith_number":"pith:KIW6BHE7","schema_version":"1.0","canonical_sha256":"522de09c9f52d2ca1ac4a66257d422685cee66d6e9e4fc742985a3181cab39ce","source":{"kind":"arxiv","id":"1207.0539","version":1},"attestation_state":"computed","paper":{"title":"Hydrogen Fluoride in High-Mass Star-forming Regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cecilia Ceccarelli, Dariusz C. Lis, David Neufeld, Floris F. S. van der Tak, Martin Emprechtinger, Matthijs H. D. van der Wiel, Raquel R. Monje, Thomas G. Phillips","submitted_at":"2012-07-02T22:39:08Z","abstract_excerpt":"Hydrogen fluoride has been established to be an excellent tracer of molecular hydrogen in diffuse clouds. In denser environments, however, the HF abundance has been shown to be approximately two orders of magnitude lower. We present Herschel/HIFI observations of HF J=1-0 toward two high-mass star formation sites, NGC6334 I and AFGL 2591. In NGC6334 I the HF line is seen in absorption in foreground clouds and the source itself, while in AFGL 2591 HF is partially in emission. We find an HF abundance with respect to H2 of 1.5e-8 in the diffuse foreground clouds, whereas in the denser parts of NGC"},"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":"1207.0539","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-07-02T22:39:08Z","cross_cats_sorted":[],"title_canon_sha256":"9ce917d1af6351e9f4f31081d0ff7e21195cab2408788634304082936eaa1b35","abstract_canon_sha256":"0cbe340b6b1d05dc7722fb1b5c88a9159f567581e8aba79378733446e97a608f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:35.489600Z","signature_b64":"GvhFpGRfmw6LFZfg3vJ1iNhaqRxAzSxkhoZVG7g+nO58IzyzCQyU4bdguF8pNx137C1lB+rjnwu6JP/kIslVCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"522de09c9f52d2ca1ac4a66257d422685cee66d6e9e4fc742985a3181cab39ce","last_reissued_at":"2026-05-18T01:56:35.489139Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:35.489139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hydrogen Fluoride in High-Mass Star-forming Regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cecilia Ceccarelli, Dariusz C. Lis, David Neufeld, Floris F. S. van der Tak, Martin Emprechtinger, Matthijs H. D. van der Wiel, Raquel R. Monje, Thomas G. Phillips","submitted_at":"2012-07-02T22:39:08Z","abstract_excerpt":"Hydrogen fluoride has been established to be an excellent tracer of molecular hydrogen in diffuse clouds. In denser environments, however, the HF abundance has been shown to be approximately two orders of magnitude lower. We present Herschel/HIFI observations of HF J=1-0 toward two high-mass star formation sites, NGC6334 I and AFGL 2591. In NGC6334 I the HF line is seen in absorption in foreground clouds and the source itself, while in AFGL 2591 HF is partially in emission. We find an HF abundance with respect to H2 of 1.5e-8 in the diffuse foreground clouds, whereas in the denser parts of NGC"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0539","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1207.0539","created_at":"2026-05-18T01:56:35.489203+00:00"},{"alias_kind":"arxiv_version","alias_value":"1207.0539v1","created_at":"2026-05-18T01:56:35.489203+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.0539","created_at":"2026-05-18T01:56:35.489203+00:00"},{"alias_kind":"pith_short_12","alias_value":"KIW6BHE7KLJM","created_at":"2026-05-18T12:27:11.947152+00:00"},{"alias_kind":"pith_short_16","alias_value":"KIW6BHE7KLJMUGWE","created_at":"2026-05-18T12:27:11.947152+00:00"},{"alias_kind":"pith_short_8","alias_value":"KIW6BHE7","created_at":"2026-05-18T12:27:11.947152+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/KIW6BHE7KLJMUGWEUZRFPVBCNB","json":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB.json","graph_json":"https://pith.science/api/pith-number/KIW6BHE7KLJMUGWEUZRFPVBCNB/graph.json","events_json":"https://pith.science/api/pith-number/KIW6BHE7KLJMUGWEUZRFPVBCNB/events.json","paper":"https://pith.science/paper/KIW6BHE7"},"agent_actions":{"view_html":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB","download_json":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB.json","view_paper":"https://pith.science/paper/KIW6BHE7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1207.0539&json=true","fetch_graph":"https://pith.science/api/pith-number/KIW6BHE7KLJMUGWEUZRFPVBCNB/graph.json","fetch_events":"https://pith.science/api/pith-number/KIW6BHE7KLJMUGWEUZRFPVBCNB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB/action/storage_attestation","attest_author":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB/action/author_attestation","sign_citation":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB/action/citation_signature","submit_replication":"https://pith.science/pith/KIW6BHE7KLJMUGWEUZRFPVBCNB/action/replication_record"}},"created_at":"2026-05-18T01:56:35.489203+00:00","updated_at":"2026-05-18T01:56:35.489203+00:00"}