{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:RDCTAVHIJRT5BNPYQD7GDQE5WC","short_pith_number":"pith:RDCTAVHI","schema_version":"1.0","canonical_sha256":"88c53054e84c67d0b5f880fe61c09db094ff2c06aabfcb4023951dab34e421f4","source":{"kind":"arxiv","id":"0812.4303","version":1},"attestation_state":"computed","paper":{"title":"Diffuse ionized gas in spiral galaxies and the disk-halo interaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. S. Hill, G. J. Madsen, K. Wood, L. M. Haffner, R. J. Reynolds","submitted_at":"2008-12-22T22:41:33Z","abstract_excerpt":"Thick layers of warm, low density ionized hydrogen (i.e., the warm ionized medium or WIM) in spiral galaxies provide direct evidence for an interaction between the disk and halo. The wide-spread ionization implies that a significant fraction of the Lyman continuum photons from O stars, produced primarily in isolated star forming regions near the midplane and often surrounded by opaque clouds of neutral hydrogen, is somehow able to propagate large distances through the disk and into the halo. Moreover, even though O stars are the source of the ionization, the temperature and ionization state of"},"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":"0812.4303","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T22:41:33Z","cross_cats_sorted":[],"title_canon_sha256":"9b7107a35bda9d0f0b587ed48401c15bc5707b21987701d196dcf5ac33d8b837","abstract_canon_sha256":"843a7c06a73c8b2e2f822772c04685bca469ef7b1b97e3677093298a6698d2e5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:44:58.086505Z","signature_b64":"mpw6cbWRGX0yVk7mPOQwsUQhfX3kigVb5iYjGN4M5cJUHBlwT8Ahp/jNiD9945OPC5S2tqaHEJkQF4Lc4jPgBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88c53054e84c67d0b5f880fe61c09db094ff2c06aabfcb4023951dab34e421f4","last_reissued_at":"2026-05-18T03:44:58.085865Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:44:58.085865Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Diffuse ionized gas in spiral galaxies and the disk-halo interaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. S. Hill, G. J. Madsen, K. Wood, L. M. Haffner, R. J. Reynolds","submitted_at":"2008-12-22T22:41:33Z","abstract_excerpt":"Thick layers of warm, low density ionized hydrogen (i.e., the warm ionized medium or WIM) in spiral galaxies provide direct evidence for an interaction between the disk and halo. The wide-spread ionization implies that a significant fraction of the Lyman continuum photons from O stars, produced primarily in isolated star forming regions near the midplane and often surrounded by opaque clouds of neutral hydrogen, is somehow able to propagate large distances through the disk and into the halo. Moreover, even though O stars are the source of the ionization, the temperature and ionization state of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.4303","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":"0812.4303","created_at":"2026-05-18T03:44:58.085955+00:00"},{"alias_kind":"arxiv_version","alias_value":"0812.4303v1","created_at":"2026-05-18T03:44:58.085955+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.4303","created_at":"2026-05-18T03:44:58.085955+00:00"},{"alias_kind":"pith_short_12","alias_value":"RDCTAVHIJRT5","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_16","alias_value":"RDCTAVHIJRT5BNPY","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_8","alias_value":"RDCTAVHI","created_at":"2026-05-18T12:25:58.018023+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/RDCTAVHIJRT5BNPYQD7GDQE5WC","json":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC.json","graph_json":"https://pith.science/api/pith-number/RDCTAVHIJRT5BNPYQD7GDQE5WC/graph.json","events_json":"https://pith.science/api/pith-number/RDCTAVHIJRT5BNPYQD7GDQE5WC/events.json","paper":"https://pith.science/paper/RDCTAVHI"},"agent_actions":{"view_html":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC","download_json":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC.json","view_paper":"https://pith.science/paper/RDCTAVHI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0812.4303&json=true","fetch_graph":"https://pith.science/api/pith-number/RDCTAVHIJRT5BNPYQD7GDQE5WC/graph.json","fetch_events":"https://pith.science/api/pith-number/RDCTAVHIJRT5BNPYQD7GDQE5WC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC/action/storage_attestation","attest_author":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC/action/author_attestation","sign_citation":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC/action/citation_signature","submit_replication":"https://pith.science/pith/RDCTAVHIJRT5BNPYQD7GDQE5WC/action/replication_record"}},"created_at":"2026-05-18T03:44:58.085955+00:00","updated_at":"2026-05-18T03:44:58.085955+00:00"}