{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:3N2GPEMN3PV5XBHC7ZS4SB7FYC","short_pith_number":"pith:3N2GPEMN","schema_version":"1.0","canonical_sha256":"db7467918ddbebdb84e2fe65c907e5c0852b770ba2fff30cbfe16f32bd3c4b7b","source":{"kind":"arxiv","id":"1605.09567","version":1},"attestation_state":"computed","paper":{"title":"Extended HI disks in nearby spiral galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Bosma","submitted_at":"2016-05-31T10:32:30Z","abstract_excerpt":"In this short write-up, I will concentrate on a few topics of interest. In the 1970s I found very extended HI disks in galaxies such as NGC 5055 and NGC 2841, out to 2 - 2.5 times the Holmberg radius. Since these galaxies are warped, a \"tilted ring model\" allows rotation curves to be derived, and evidence for dark matter to be found. The evaluation of the amount of dark matter is hampered by a disk-halo degeneracy, which can possibly be broken by observations of velocity dispersions in both the MgI region and the CaII region."},"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":"1605.09567","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-31T10:32:30Z","cross_cats_sorted":[],"title_canon_sha256":"39aa39e764e84922fdfee505114a6db4365dbced1b00854f1763727ef727fa3e","abstract_canon_sha256":"e34737af80a5804ba7695d1de76a754af17f40a7195ee19b9f0834e6c6d693f1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:50.673675Z","signature_b64":"1PI21e5YqU+NLUSvqr2/21+KAHUlEGy9MSGgOFf2TgPxMCWVaTCIu2wC4/oaiGGUky9wn/lkqPXXv5buG9ysAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db7467918ddbebdb84e2fe65c907e5c0852b770ba2fff30cbfe16f32bd3c4b7b","last_reissued_at":"2026-05-18T00:47:50.673012Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:50.673012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Extended HI disks in nearby spiral galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Bosma","submitted_at":"2016-05-31T10:32:30Z","abstract_excerpt":"In this short write-up, I will concentrate on a few topics of interest. In the 1970s I found very extended HI disks in galaxies such as NGC 5055 and NGC 2841, out to 2 - 2.5 times the Holmberg radius. Since these galaxies are warped, a \"tilted ring model\" allows rotation curves to be derived, and evidence for dark matter to be found. The evaluation of the amount of dark matter is hampered by a disk-halo degeneracy, which can possibly be broken by observations of velocity dispersions in both the MgI region and the CaII region."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09567","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":"1605.09567","created_at":"2026-05-18T00:47:50.673116+00:00"},{"alias_kind":"arxiv_version","alias_value":"1605.09567v1","created_at":"2026-05-18T00:47:50.673116+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09567","created_at":"2026-05-18T00:47:50.673116+00:00"},{"alias_kind":"pith_short_12","alias_value":"3N2GPEMN3PV5","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_16","alias_value":"3N2GPEMN3PV5XBHC","created_at":"2026-05-18T12:29:55.572404+00:00"},{"alias_kind":"pith_short_8","alias_value":"3N2GPEMN","created_at":"2026-05-18T12:29:55.572404+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/3N2GPEMN3PV5XBHC7ZS4SB7FYC","json":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC.json","graph_json":"https://pith.science/api/pith-number/3N2GPEMN3PV5XBHC7ZS4SB7FYC/graph.json","events_json":"https://pith.science/api/pith-number/3N2GPEMN3PV5XBHC7ZS4SB7FYC/events.json","paper":"https://pith.science/paper/3N2GPEMN"},"agent_actions":{"view_html":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC","download_json":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC.json","view_paper":"https://pith.science/paper/3N2GPEMN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1605.09567&json=true","fetch_graph":"https://pith.science/api/pith-number/3N2GPEMN3PV5XBHC7ZS4SB7FYC/graph.json","fetch_events":"https://pith.science/api/pith-number/3N2GPEMN3PV5XBHC7ZS4SB7FYC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC/action/storage_attestation","attest_author":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC/action/author_attestation","sign_citation":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC/action/citation_signature","submit_replication":"https://pith.science/pith/3N2GPEMN3PV5XBHC7ZS4SB7FYC/action/replication_record"}},"created_at":"2026-05-18T00:47:50.673116+00:00","updated_at":"2026-05-18T00:47:50.673116+00:00"}