{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:4KTX23VQP5IDKC5FPPRI6MYLMV","short_pith_number":"pith:4KTX23VQ","canonical_record":{"source":{"id":"2212.05687","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-12T04:05:54Z","cross_cats_sorted":[],"title_canon_sha256":"7a13ab0053454600e8f4eaa21f017850c7fa4022e6e1bdafa944a5b3a50f3c81","abstract_canon_sha256":"1161125aa1877d698e59c3f936e7bba3c004dc5232e44733018e95e7ab894963"},"schema_version":"1.0"},"canonical_sha256":"e2a77d6eb07f50350ba57be28f330b655f341c201780bde355904a38a6e6e5b1","source":{"kind":"arxiv","id":"2212.05687","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.05687","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"arxiv_version","alias_value":"2212.05687v1","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.05687","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_12","alias_value":"4KTX23VQP5ID","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_16","alias_value":"4KTX23VQP5IDKC5F","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_8","alias_value":"4KTX23VQ","created_at":"2026-07-05T06:32:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:4KTX23VQP5IDKC5FPPRI6MYLMV","target":"record","payload":{"canonical_record":{"source":{"id":"2212.05687","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-12T04:05:54Z","cross_cats_sorted":[],"title_canon_sha256":"7a13ab0053454600e8f4eaa21f017850c7fa4022e6e1bdafa944a5b3a50f3c81","abstract_canon_sha256":"1161125aa1877d698e59c3f936e7bba3c004dc5232e44733018e95e7ab894963"},"schema_version":"1.0"},"canonical_sha256":"e2a77d6eb07f50350ba57be28f330b655f341c201780bde355904a38a6e6e5b1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:32:35.842839Z","signature_b64":"tuN7r1mla/C5soK4tDRJMumvubRksUHi5RhgI+6iSuEVzZZffWrI0poH4UXbepZ/M5VTt8JuRQG3ak+Z7YXlDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2a77d6eb07f50350ba57be28f330b655f341c201780bde355904a38a6e6e5b1","last_reissued_at":"2026-07-05T06:32:35.842249Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:32:35.842249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2212.05687","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:32:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XMyWFAFVPULlD7kUKfZQQiHu2D8Vonbi6ApjU8yvWqsV+NkMDcHm3fdHtVFAfQF5yeC8NX5b0sSmWWWXceHRCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:52:06.745510Z"},"content_sha256":"5a350c02fc9c814cd1105556d85b222b55cc3634f0c7aa1cab49db660670ca0c","schema_version":"1.0","event_id":"sha256:5a350c02fc9c814cd1105556d85b222b55cc3634f0c7aa1cab49db660670ca0c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:4KTX23VQP5IDKC5FPPRI6MYLMV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimating Molecular Gas Content in Galaxies from PAH Emission","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2), 2) ((1) Kavli Institute for Astronomy, (2) Department of Astronomy, Astrophysics, Luis C. Ho (1, Lulu Zhang (1, Peking University, Peking University), School of Physics","submitted_at":"2022-12-12T04:05:54Z","abstract_excerpt":"Emission from polycyclic aromatic hydrocarbons (PAHs), a commonly used indicator of star formation activity in galaxies, also has the potential to serve as an effective empirical tracer of molecular gas. We use a sample of 19 nearby galaxies with spatially resolved mid-infrared Spitzer spectroscopy, multi-wavelength optical and mid-infrared imaging, and millimeter interferometric CO(1-0) maps to investigate the feasibility of using PAH emission as an empirical proxy to estimate molecular gas mass. PAH emission correlates strongly with CO emission on sub-kpc scales over the diverse environments"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.05687","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2212.05687/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:32:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I0fvXJVkX6k/GP6FDNP93ZN9my1GQ0hjUUI8tCZUSoe5VM46GOv5P2Nlyv/YFQ4ayxi+ffI4ktMpVs55VoXDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:52:06.746439Z"},"content_sha256":"1c87242eaa505e162f044c051931936416a245b0fc49c01d690bbc912b791538","schema_version":"1.0","event_id":"sha256:1c87242eaa505e162f044c051931936416a245b0fc49c01d690bbc912b791538"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/bundle.json","state_url":"https://pith.science/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T22:52:06Z","links":{"resolver":"https://pith.science/pith/4KTX23VQP5IDKC5FPPRI6MYLMV","bundle":"https://pith.science/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/bundle.json","state":"https://pith.science/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4KTX23VQP5IDKC5FPPRI6MYLMV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:4KTX23VQP5IDKC5FPPRI6MYLMV","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":"1161125aa1877d698e59c3f936e7bba3c004dc5232e44733018e95e7ab894963","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-12T04:05:54Z","title_canon_sha256":"7a13ab0053454600e8f4eaa21f017850c7fa4022e6e1bdafa944a5b3a50f3c81"},"schema_version":"1.0","source":{"id":"2212.05687","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.05687","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"arxiv_version","alias_value":"2212.05687v1","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.05687","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_12","alias_value":"4KTX23VQP5ID","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_16","alias_value":"4KTX23VQP5IDKC5F","created_at":"2026-07-05T06:32:35Z"},{"alias_kind":"pith_short_8","alias_value":"4KTX23VQ","created_at":"2026-07-05T06:32:35Z"}],"graph_snapshots":[{"event_id":"sha256:1c87242eaa505e162f044c051931936416a245b0fc49c01d690bbc912b791538","target":"graph","created_at":"2026-07-05T06:32:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2212.05687/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Emission from polycyclic aromatic hydrocarbons (PAHs), a commonly used indicator of star formation activity in galaxies, also has the potential to serve as an effective empirical tracer of molecular gas. We use a sample of 19 nearby galaxies with spatially resolved mid-infrared Spitzer spectroscopy, multi-wavelength optical and mid-infrared imaging, and millimeter interferometric CO(1-0) maps to investigate the feasibility of using PAH emission as an empirical proxy to estimate molecular gas mass. PAH emission correlates strongly with CO emission on sub-kpc scales over the diverse environments","authors_text":"2), 2) ((1) Kavli Institute for Astronomy, (2) Department of Astronomy, Astrophysics, Luis C. Ho (1, Lulu Zhang (1, Peking University, Peking University), School of Physics","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-12T04:05:54Z","title":"Estimating Molecular Gas Content in Galaxies from PAH Emission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.05687","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":"sha256:5a350c02fc9c814cd1105556d85b222b55cc3634f0c7aa1cab49db660670ca0c","target":"record","created_at":"2026-07-05T06:32:35Z","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":"1161125aa1877d698e59c3f936e7bba3c004dc5232e44733018e95e7ab894963","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-12T04:05:54Z","title_canon_sha256":"7a13ab0053454600e8f4eaa21f017850c7fa4022e6e1bdafa944a5b3a50f3c81"},"schema_version":"1.0","source":{"id":"2212.05687","kind":"arxiv","version":1}},"canonical_sha256":"e2a77d6eb07f50350ba57be28f330b655f341c201780bde355904a38a6e6e5b1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2a77d6eb07f50350ba57be28f330b655f341c201780bde355904a38a6e6e5b1","first_computed_at":"2026-07-05T06:32:35.842249Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:32:35.842249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tuN7r1mla/C5soK4tDRJMumvubRksUHi5RhgI+6iSuEVzZZffWrI0poH4UXbepZ/M5VTt8JuRQG3ak+Z7YXlDw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:32:35.842839Z","signed_message":"canonical_sha256_bytes"},"source_id":"2212.05687","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a350c02fc9c814cd1105556d85b222b55cc3634f0c7aa1cab49db660670ca0c","sha256:1c87242eaa505e162f044c051931936416a245b0fc49c01d690bbc912b791538"],"state_sha256":"25558c8a5cd0a67567d0c141bd864f4c62ae3596d1a159207c667a834af1f43e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A59C/Nd6mTv5fwwy24w4bx5UIZwMC/GmbEzcLLlR516wo/RCHFp66ngT3/s1cXhOaVSsZnwMpbzJUg09G7qNCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:52:06.753282Z","bundle_sha256":"fefb26d5b96830ba480455f981141b0e8f6fb7b9878c4d9ed9b2fc5313fc9498"}}