{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:X7UVWD6UE4D3WB3UUFLFEO2OUU","short_pith_number":"pith:X7UVWD6U","schema_version":"1.0","canonical_sha256":"bfe95b0fd42707bb0774a156523b4ea510bd15853fefd3cbf271ed9c9519fcc0","source":{"kind":"arxiv","id":"1210.6558","version":1},"attestation_state":"computed","paper":{"title":"The Carriers of the Interstellar Unidentified Infrared Emission Features: Aromatic or Aliphatic?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aigen Li, B. T. Draine","submitted_at":"2012-10-24T14:55:46Z","abstract_excerpt":"The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, and 11.3 micrometer, commonly attributed to polycyclic aromatic hydrocarbon (PAH) molecules, have been recently ascribed to coal- or kerogen-like organic nanoparticles with a mixed aromatic-aliphatic structure. However, we show in this Letter that this hypothesis is inconsistent with observations. We estimate the aliphatic fraction of the UIE carriers based on the observed intensities of the 3.4 and 6.85 micrometer emission features by attributing them exclusively to aliphatic C-H stretch and aliphatic C-H deformation vib"},"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":"1210.6558","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-10-24T14:55:46Z","cross_cats_sorted":[],"title_canon_sha256":"9996cd51b0b11b81202e0b0253a1130a4973f0f4a6f1e7e98947f3afc1085089","abstract_canon_sha256":"305b1c5d0ca96b25dd051227bc0dd4a7ded3c26b4057e9ee7e39ce907698c996"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:43.701134Z","signature_b64":"qoWD8uIJGOTViAnWSZchSI2qp9mImjnxJfrdeoCARv7jt7WMVxCKOloGG5WdQQx8RQ61CHvy/X7Phq3VK116Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfe95b0fd42707bb0774a156523b4ea510bd15853fefd3cbf271ed9c9519fcc0","last_reissued_at":"2026-05-18T01:53:43.700601Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:43.700601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Carriers of the Interstellar Unidentified Infrared Emission Features: Aromatic or Aliphatic?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aigen Li, B. T. Draine","submitted_at":"2012-10-24T14:55:46Z","abstract_excerpt":"The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, and 11.3 micrometer, commonly attributed to polycyclic aromatic hydrocarbon (PAH) molecules, have been recently ascribed to coal- or kerogen-like organic nanoparticles with a mixed aromatic-aliphatic structure. However, we show in this Letter that this hypothesis is inconsistent with observations. We estimate the aliphatic fraction of the UIE carriers based on the observed intensities of the 3.4 and 6.85 micrometer emission features by attributing them exclusively to aliphatic C-H stretch and aliphatic C-H deformation vib"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.6558","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":"1210.6558","created_at":"2026-05-18T01:53:43.700672+00:00"},{"alias_kind":"arxiv_version","alias_value":"1210.6558v1","created_at":"2026-05-18T01:53:43.700672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.6558","created_at":"2026-05-18T01:53:43.700672+00:00"},{"alias_kind":"pith_short_12","alias_value":"X7UVWD6UE4D3","created_at":"2026-05-18T12:27:27.928770+00:00"},{"alias_kind":"pith_short_16","alias_value":"X7UVWD6UE4D3WB3U","created_at":"2026-05-18T12:27:27.928770+00:00"},{"alias_kind":"pith_short_8","alias_value":"X7UVWD6U","created_at":"2026-05-18T12:27:27.928770+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.18438","citing_title":"Velocity-resolved [O I] 63,145 um, [C II] 158 um, and OH mapping along the Orion BN/KL explosive outflow and irradiated shocks","ref_index":224,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU","json":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU.json","graph_json":"https://pith.science/api/pith-number/X7UVWD6UE4D3WB3UUFLFEO2OUU/graph.json","events_json":"https://pith.science/api/pith-number/X7UVWD6UE4D3WB3UUFLFEO2OUU/events.json","paper":"https://pith.science/paper/X7UVWD6U"},"agent_actions":{"view_html":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU","download_json":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU.json","view_paper":"https://pith.science/paper/X7UVWD6U","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1210.6558&json=true","fetch_graph":"https://pith.science/api/pith-number/X7UVWD6UE4D3WB3UUFLFEO2OUU/graph.json","fetch_events":"https://pith.science/api/pith-number/X7UVWD6UE4D3WB3UUFLFEO2OUU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU/action/storage_attestation","attest_author":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU/action/author_attestation","sign_citation":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU/action/citation_signature","submit_replication":"https://pith.science/pith/X7UVWD6UE4D3WB3UUFLFEO2OUU/action/replication_record"}},"created_at":"2026-05-18T01:53:43.700672+00:00","updated_at":"2026-05-18T01:53:43.700672+00:00"}