{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:LGYDC7DZYBDDJ3VWANGO7TXVDM","short_pith_number":"pith:LGYDC7DZ","schema_version":"1.0","canonical_sha256":"59b0317c79c04634eeb6034cefcef51b2d12ee0f784b9efc0e1ac3ce4ab66b27","source":{"kind":"arxiv","id":"1809.10136","version":1},"attestation_state":"computed","paper":{"title":"PAHs and star formation in the HII regions of nearby galaxies M83 and M33","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.G.G.M. Tielens, A. Maragkoudakis, D. Hemachandra, D. J. Stock, E. Peeters, N. Ivkovich","submitted_at":"2018-09-26T17:48:33Z","abstract_excerpt":"We present mid-infrared (MIR) spectra of HII regions within star-forming galaxies M83 and M33. Their emission features are compared with Galactic and extragalactic HII regions, HII-type galaxies, starburst galaxies, and Seyfert/LINER type galaxies. Our main results are as follows: (i) the M33 and M83 HII regions lie in between Seyfert/LINER galaxies and HII-type galaxies in the 7.7/11.3 - 6.2/11.3 plane, while the different sub-samples exhibiting different 7.7/6.2 ratios; (ii) Using the NASA Ames PAH IR Spectroscopic database, we demonstrate that the 6.2/7.7 ratio does not effectively track PA"},"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":"1809.10136","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-26T17:48:33Z","cross_cats_sorted":[],"title_canon_sha256":"7a2b41b99fb626c10ef62628e738fab8d65aa944eb8436e9cc46df8595d9aa28","abstract_canon_sha256":"931dacd9a944bf59b04f26723755c4b41088b688ebbb6106e714602efb8e5dcd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:01.252219Z","signature_b64":"gRf1kZU0gq4u99vhs0ziYhxw1KOe2UTkMXZ+jXT6y/geiNQbzaxhL0XxeBi1cIDMS+KiaUjIXckNvZvzB4FODg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59b0317c79c04634eeb6034cefcef51b2d12ee0f784b9efc0e1ac3ce4ab66b27","last_reissued_at":"2026-05-18T00:03:01.251540Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:01.251540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"PAHs and star formation in the HII regions of nearby galaxies M83 and M33","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.G.G.M. Tielens, A. Maragkoudakis, D. Hemachandra, D. J. Stock, E. Peeters, N. Ivkovich","submitted_at":"2018-09-26T17:48:33Z","abstract_excerpt":"We present mid-infrared (MIR) spectra of HII regions within star-forming galaxies M83 and M33. Their emission features are compared with Galactic and extragalactic HII regions, HII-type galaxies, starburst galaxies, and Seyfert/LINER type galaxies. Our main results are as follows: (i) the M33 and M83 HII regions lie in between Seyfert/LINER galaxies and HII-type galaxies in the 7.7/11.3 - 6.2/11.3 plane, while the different sub-samples exhibiting different 7.7/6.2 ratios; (ii) Using the NASA Ames PAH IR Spectroscopic database, we demonstrate that the 6.2/7.7 ratio does not effectively track PA"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.10136","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":"1809.10136","created_at":"2026-05-18T00:03:01.251654+00:00"},{"alias_kind":"arxiv_version","alias_value":"1809.10136v1","created_at":"2026-05-18T00:03:01.251654+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.10136","created_at":"2026-05-18T00:03:01.251654+00:00"},{"alias_kind":"pith_short_12","alias_value":"LGYDC7DZYBDD","created_at":"2026-05-18T12:32:37.024351+00:00"},{"alias_kind":"pith_short_16","alias_value":"LGYDC7DZYBDDJ3VW","created_at":"2026-05-18T12:32:37.024351+00:00"},{"alias_kind":"pith_short_8","alias_value":"LGYDC7DZ","created_at":"2026-05-18T12:32:37.024351+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/LGYDC7DZYBDDJ3VWANGO7TXVDM","json":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM.json","graph_json":"https://pith.science/api/pith-number/LGYDC7DZYBDDJ3VWANGO7TXVDM/graph.json","events_json":"https://pith.science/api/pith-number/LGYDC7DZYBDDJ3VWANGO7TXVDM/events.json","paper":"https://pith.science/paper/LGYDC7DZ"},"agent_actions":{"view_html":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM","download_json":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM.json","view_paper":"https://pith.science/paper/LGYDC7DZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1809.10136&json=true","fetch_graph":"https://pith.science/api/pith-number/LGYDC7DZYBDDJ3VWANGO7TXVDM/graph.json","fetch_events":"https://pith.science/api/pith-number/LGYDC7DZYBDDJ3VWANGO7TXVDM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM/action/storage_attestation","attest_author":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM/action/author_attestation","sign_citation":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM/action/citation_signature","submit_replication":"https://pith.science/pith/LGYDC7DZYBDDJ3VWANGO7TXVDM/action/replication_record"}},"created_at":"2026-05-18T00:03:01.251654+00:00","updated_at":"2026-05-18T00:03:01.251654+00:00"}