{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:6OVZQIVDJK63UPCT57ECG7J6JH","short_pith_number":"pith:6OVZQIVD","schema_version":"1.0","canonical_sha256":"f3ab9822a34abdba3c53efc8237d3e49d9296307163eaa0c7d123ee6a430b747","source":{"kind":"arxiv","id":"1202.4699","version":4},"attestation_state":"computed","paper":{"title":"The Lesser Role of Shear in Star Formation: Insight from the Galactic Ring Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(3) JMU, (4) MPIfR, Ali Dariush (2) ((1) Imperial College London (2) IPAC, Bonn), Caltech, George Helou (2), James Urquhart (4), Liverpool, Sami Dib (1), Toby Moore (3)","submitted_at":"2012-02-21T16:59:36Z","abstract_excerpt":"We analyse the role played by shear in regulating star formation in the Galaxy on the scale of individual molecular clouds. The clouds are selected from the 13^CO J=1-0 line of the Galactic Ring Survey. For each cloud, we estimate the shear parameter which describes the ability of density perturbations to grow within the cloud. We find that for almost all molecular clouds considered, there is no evidence that shear is playing a significant role in opposing the effects of self-gravity. We also find that the shear parameter of the clouds does not depend on their position in the Galaxy. Furthermo"},"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":"1202.4699","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-21T16:59:36Z","cross_cats_sorted":[],"title_canon_sha256":"6d0c2d7f5f907604489e7786b857af3f84a3b25a82ba855fddf1b9c101c0ae26","abstract_canon_sha256":"79a464f45f8f6b1bf99ff01e403f368a17cdaf4c3a56a3eaed11d4613f1fcae8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:22.768034Z","signature_b64":"rXu5ABZkbbFtdRUBb2RkDOtJP42qLQdGKWlMh1E8uD16vxiVdlkwHKojwBcIu+JM6fo9mAkaRrfd4ua8W5naAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3ab9822a34abdba3c53efc8237d3e49d9296307163eaa0c7d123ee6a430b747","last_reissued_at":"2026-05-18T01:58:22.767558Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:22.767558Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Lesser Role of Shear in Star Formation: Insight from the Galactic Ring Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(3) JMU, (4) MPIfR, Ali Dariush (2) ((1) Imperial College London (2) IPAC, Bonn), Caltech, George Helou (2), James Urquhart (4), Liverpool, Sami Dib (1), Toby Moore (3)","submitted_at":"2012-02-21T16:59:36Z","abstract_excerpt":"We analyse the role played by shear in regulating star formation in the Galaxy on the scale of individual molecular clouds. The clouds are selected from the 13^CO J=1-0 line of the Galactic Ring Survey. For each cloud, we estimate the shear parameter which describes the ability of density perturbations to grow within the cloud. We find that for almost all molecular clouds considered, there is no evidence that shear is playing a significant role in opposing the effects of self-gravity. We also find that the shear parameter of the clouds does not depend on their position in the Galaxy. Furthermo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4699","kind":"arxiv","version":4},"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":"1202.4699","created_at":"2026-05-18T01:58:22.767625+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.4699v4","created_at":"2026-05-18T01:58:22.767625+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4699","created_at":"2026-05-18T01:58:22.767625+00:00"},{"alias_kind":"pith_short_12","alias_value":"6OVZQIVDJK63","created_at":"2026-05-18T12:26:56.085431+00:00"},{"alias_kind":"pith_short_16","alias_value":"6OVZQIVDJK63UPCT","created_at":"2026-05-18T12:26:56.085431+00:00"},{"alias_kind":"pith_short_8","alias_value":"6OVZQIVD","created_at":"2026-05-18T12:26:56.085431+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/6OVZQIVDJK63UPCT57ECG7J6JH","json":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH.json","graph_json":"https://pith.science/api/pith-number/6OVZQIVDJK63UPCT57ECG7J6JH/graph.json","events_json":"https://pith.science/api/pith-number/6OVZQIVDJK63UPCT57ECG7J6JH/events.json","paper":"https://pith.science/paper/6OVZQIVD"},"agent_actions":{"view_html":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH","download_json":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH.json","view_paper":"https://pith.science/paper/6OVZQIVD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.4699&json=true","fetch_graph":"https://pith.science/api/pith-number/6OVZQIVDJK63UPCT57ECG7J6JH/graph.json","fetch_events":"https://pith.science/api/pith-number/6OVZQIVDJK63UPCT57ECG7J6JH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH/action/storage_attestation","attest_author":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH/action/author_attestation","sign_citation":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH/action/citation_signature","submit_replication":"https://pith.science/pith/6OVZQIVDJK63UPCT57ECG7J6JH/action/replication_record"}},"created_at":"2026-05-18T01:58:22.767625+00:00","updated_at":"2026-05-18T01:58:22.767625+00:00"}