{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MM6UVLXWHU7FEUMSKCILIJPKZI","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":"e6ff4b7a8e1a0b3bd6966de38b6eec18390dd194ada5672d688fee12f6b24d12","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-12T23:52:06Z","title_canon_sha256":"42e31c4547d770598ab63de5ec319546ddea7d74027ec8517019e6ec1b3fb666"},"schema_version":"1.0","source":{"id":"1502.03859","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.03859","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"1502.03859v1","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.03859","created_at":"2026-05-18T01:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"MM6UVLXWHU7F","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MM6UVLXWHU7FEUMS","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MM6UVLXW","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:1cdbbc81bd48327abc69cc3c3c955825c346f1ff763a42837fd245ba84fa539f","target":"graph","created_at":"2026-05-18T01:41:03Z","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":"In this Letter we investigate the shape of the probability distribution of column densities (PDF) in molecular clouds. Through the use of low-noise, extinction-calibrated \\textit{Herschel}/\\textit{Planck} emission data for eight molecular clouds, we demonstrate that, contrary to common belief, the PDFs of molecular clouds are not described well by log-normal functions, but are instead power laws with exponents close to two and with breaks between $A_K \\simeq 0.1$ and $0.2\\,\\mathrm{mag}$, so close to the CO self-shielding limit and not far from the transition between molecular and atomic gas. A","authors_text":"Charles J. Lada, Jo\\~ao Alves, Marco Lombardi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-12T23:52:06Z","title":"Molecular clouds have power-law probability distribution functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.03859","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:dce9d58f0c1b362f21d7ca50d3858a50c179bb710a01a1c96939c024d0677d96","target":"record","created_at":"2026-05-18T01:41:03Z","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":"e6ff4b7a8e1a0b3bd6966de38b6eec18390dd194ada5672d688fee12f6b24d12","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-12T23:52:06Z","title_canon_sha256":"42e31c4547d770598ab63de5ec319546ddea7d74027ec8517019e6ec1b3fb666"},"schema_version":"1.0","source":{"id":"1502.03859","kind":"arxiv","version":1}},"canonical_sha256":"633d4aaef63d3e5251925090b425eaca049872c511da2be22cb3ccae13d40621","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"633d4aaef63d3e5251925090b425eaca049872c511da2be22cb3ccae13d40621","first_computed_at":"2026-05-18T01:41:03.466871Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:03.466871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LF7gkI/UaCAq6xCiXDkMntWik0vlrBvoH14mJs2e5CqKz7s/bifKANRfr2fCrtp2mzRVlgdDWrE506rg5OCgCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:03.467446Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.03859","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dce9d58f0c1b362f21d7ca50d3858a50c179bb710a01a1c96939c024d0677d96","sha256:1cdbbc81bd48327abc69cc3c3c955825c346f1ff763a42837fd245ba84fa539f"],"state_sha256":"6b68fdc744e8dfec9a0b38715ffacca3118db9b713880b6bb41d500e0dec4f39"}