{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:ZHU5VWQ4BDJWS32FJ6YVBPV266","short_pith_number":"pith:ZHU5VWQ4","schema_version":"1.0","canonical_sha256":"c9e9dada1c08d3696f454fb150bebaf7b9dadcb5198923bb9a1a2b66d1ee2a2c","source":{"kind":"arxiv","id":"0903.3950","version":1},"attestation_state":"computed","paper":{"title":"Molecular hydrogen deficiency in HI-poor galaxies and its implications for star formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Boselli, Giuseppe Gavazzi, J. Xavier Prochaska, Mark R. Krumholz, Michele Fumagalli","submitted_at":"2009-03-23T20:04:11Z","abstract_excerpt":"We use a sample of 47 homogeneous and high sensitivity CO images taken from the Nobeyama and BIMA surveys to demonstrate that, contrary to common belief, a significant number (~40%) of HI-deficient nearby spiral galaxies are also depleted in molecular hydrogen. While HI-deficiency by itself is not a sufficient condition for molecular gas depletion, we find that H2 reduction is associated with the removal of HI inside the galaxy optical disk. Those HI-deficient galaxies with normal H2 content have lost HI mainly from outside their optical disks, where the H2 content is low in all galaxies. This"},"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":"0903.3950","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-23T20:04:11Z","cross_cats_sorted":[],"title_canon_sha256":"ab50294693561af2f33f3c7681722755646bcbb76d6a7cc46b9336a8278f9454","abstract_canon_sha256":"c4241ee5c219d5a4932018f5702251d174e7aaba0e08fceed42820586dfed18b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:15.687412Z","signature_b64":"0mPwgHk+eK8eKOdSFo7HMn4sA98SSUMsoN8Js8udrIVBt4HZFHFVckibCixM2qXptdINntE0dLLA1vhUh4w2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9e9dada1c08d3696f454fb150bebaf7b9dadcb5198923bb9a1a2b66d1ee2a2c","last_reissued_at":"2026-05-18T04:29:15.686704Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:15.686704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Molecular hydrogen deficiency in HI-poor galaxies and its implications for star formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Boselli, Giuseppe Gavazzi, J. Xavier Prochaska, Mark R. Krumholz, Michele Fumagalli","submitted_at":"2009-03-23T20:04:11Z","abstract_excerpt":"We use a sample of 47 homogeneous and high sensitivity CO images taken from the Nobeyama and BIMA surveys to demonstrate that, contrary to common belief, a significant number (~40%) of HI-deficient nearby spiral galaxies are also depleted in molecular hydrogen. While HI-deficiency by itself is not a sufficient condition for molecular gas depletion, we find that H2 reduction is associated with the removal of HI inside the galaxy optical disk. Those HI-deficient galaxies with normal H2 content have lost HI mainly from outside their optical disks, where the H2 content is low in all galaxies. This"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.3950","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":"0903.3950","created_at":"2026-05-18T04:29:15.686816+00:00"},{"alias_kind":"arxiv_version","alias_value":"0903.3950v1","created_at":"2026-05-18T04:29:15.686816+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.3950","created_at":"2026-05-18T04:29:15.686816+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZHU5VWQ4BDJW","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZHU5VWQ4BDJWS32F","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZHU5VWQ4","created_at":"2026-05-18T12:26:02.257875+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/ZHU5VWQ4BDJWS32FJ6YVBPV266","json":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266.json","graph_json":"https://pith.science/api/pith-number/ZHU5VWQ4BDJWS32FJ6YVBPV266/graph.json","events_json":"https://pith.science/api/pith-number/ZHU5VWQ4BDJWS32FJ6YVBPV266/events.json","paper":"https://pith.science/paper/ZHU5VWQ4"},"agent_actions":{"view_html":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266","download_json":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266.json","view_paper":"https://pith.science/paper/ZHU5VWQ4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0903.3950&json=true","fetch_graph":"https://pith.science/api/pith-number/ZHU5VWQ4BDJWS32FJ6YVBPV266/graph.json","fetch_events":"https://pith.science/api/pith-number/ZHU5VWQ4BDJWS32FJ6YVBPV266/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266/action/storage_attestation","attest_author":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266/action/author_attestation","sign_citation":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266/action/citation_signature","submit_replication":"https://pith.science/pith/ZHU5VWQ4BDJWS32FJ6YVBPV266/action/replication_record"}},"created_at":"2026-05-18T04:29:15.686816+00:00","updated_at":"2026-05-18T04:29:15.686816+00:00"}