{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:G3HAZXNXYVKQDBBAYBODCAQDCZ","short_pith_number":"pith:G3HAZXNX","schema_version":"1.0","canonical_sha256":"36ce0cddb7c555018420c05c3102031642ae966e0216ba2d62bc8daa09c240e7","source":{"kind":"arxiv","id":"0911.0161","version":1},"attestation_state":"computed","paper":{"title":"Effects of Non-Circular Motions on Azimuthal Color Gradients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Eric E. Martinez-Garcia, Gilberto C. Gomez, Rosa A. Gonzalez-Lopezlira","submitted_at":"2009-11-02T16:13:04Z","abstract_excerpt":"Assuming that density waves trigger star formation, and that young stars preserve the velocity components of the molecular gas where they are born, we analyze the effects that non-circular gas orbits have on color gradients across spiral arms. We try two approaches, one involving semi-analytical solutions for spiral shocks, and another with magnetohydrodynamic (MHD) numerical simulation data. We find that, if non-circular motions are ignored, the comparison between observed color gradients and stellar population synthesis models would in principle yield pattern speed values that are systematic"},"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":"0911.0161","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-02T16:13:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2fbeab3b2a0f9dd009d0f33d54729eb2a736dd462ae344df1c00d3958f192a01","abstract_canon_sha256":"791306be8b8847cc5ce00d844db930487b069571aba2fcd4a8919f809b2b7525"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:12.282022Z","signature_b64":"Fc+ExzZiZCPjZAsRspmJcNW7yp3fktb9JmEyp9WQr6BRKcHxG0HCC0iiQ3glRQm5N1dHA0+tp2rT5H7OPUk6Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36ce0cddb7c555018420c05c3102031642ae966e0216ba2d62bc8daa09c240e7","last_reissued_at":"2026-05-18T02:34:12.281483Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:12.281483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Effects of Non-Circular Motions on Azimuthal Color Gradients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Eric E. Martinez-Garcia, Gilberto C. Gomez, Rosa A. Gonzalez-Lopezlira","submitted_at":"2009-11-02T16:13:04Z","abstract_excerpt":"Assuming that density waves trigger star formation, and that young stars preserve the velocity components of the molecular gas where they are born, we analyze the effects that non-circular gas orbits have on color gradients across spiral arms. We try two approaches, one involving semi-analytical solutions for spiral shocks, and another with magnetohydrodynamic (MHD) numerical simulation data. We find that, if non-circular motions are ignored, the comparison between observed color gradients and stellar population synthesis models would in principle yield pattern speed values that are systematic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0161","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":"0911.0161","created_at":"2026-05-18T02:34:12.281568+00:00"},{"alias_kind":"arxiv_version","alias_value":"0911.0161v1","created_at":"2026-05-18T02:34:12.281568+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0161","created_at":"2026-05-18T02:34:12.281568+00:00"},{"alias_kind":"pith_short_12","alias_value":"G3HAZXNXYVKQ","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"G3HAZXNXYVKQDBBA","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"G3HAZXNX","created_at":"2026-05-18T12:25:59.703012+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/G3HAZXNXYVKQDBBAYBODCAQDCZ","json":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ.json","graph_json":"https://pith.science/api/pith-number/G3HAZXNXYVKQDBBAYBODCAQDCZ/graph.json","events_json":"https://pith.science/api/pith-number/G3HAZXNXYVKQDBBAYBODCAQDCZ/events.json","paper":"https://pith.science/paper/G3HAZXNX"},"agent_actions":{"view_html":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ","download_json":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ.json","view_paper":"https://pith.science/paper/G3HAZXNX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0911.0161&json=true","fetch_graph":"https://pith.science/api/pith-number/G3HAZXNXYVKQDBBAYBODCAQDCZ/graph.json","fetch_events":"https://pith.science/api/pith-number/G3HAZXNXYVKQDBBAYBODCAQDCZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ/action/storage_attestation","attest_author":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ/action/author_attestation","sign_citation":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ/action/citation_signature","submit_replication":"https://pith.science/pith/G3HAZXNXYVKQDBBAYBODCAQDCZ/action/replication_record"}},"created_at":"2026-05-18T02:34:12.281568+00:00","updated_at":"2026-05-18T02:34:12.281568+00:00"}