{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:2HFW4ERK3JOST7EZLFNBKTMR4T","short_pith_number":"pith:2HFW4ERK","schema_version":"1.0","canonical_sha256":"d1cb6e122ada5d29fc99595a154d91e4e37f99f40c5c0d80d1f4244494deeba0","source":{"kind":"arxiv","id":"1204.2959","version":1},"attestation_state":"computed","paper":{"title":"Dead Zones around Young Stellar Objects: FU Orionis Outbursts and Transition Discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"J. E. Pringle, Mario Livio, Rebecca G. Martin, Stephen H. Lubow","submitted_at":"2012-04-13T11:46:37Z","abstract_excerpt":"We perform global time-dependent simulations of an accretion disc around a young stellar object with a dead zone (a region where the magneto-rotational instability cannot drive turbulence because the material is not sufficiently ionised). For infall accretion rates on to the disc of around 10^-7 Msun/yr, dead zones occur if the critical magnetic Reynolds number is larger than about 10^4. We model the collapse of a molecular gas cloud. At early times when the infall accretion rate is high, the disc is thermally ionised and fully turbulent. However, as the infall accretion rate drops, a dead zon"},"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":"1204.2959","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-04-13T11:46:37Z","cross_cats_sorted":[],"title_canon_sha256":"7cec1732abc237b2e551a3749127bd10150fae0d9a06d8b2021eecc4917dad30","abstract_canon_sha256":"2e58a08ceb051629de32437da3a50fefa0001cb633378f83bf4c3f07b70663f8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:52.774381Z","signature_b64":"Je08A3vWbFv+f7yKWX8gOLTuebPR9SQTIQmQ60QD3A1EmdqEfLB0vrhEwl3PGkuwC/IKESYycKk/u83BEwa+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1cb6e122ada5d29fc99595a154d91e4e37f99f40c5c0d80d1f4244494deeba0","last_reissued_at":"2026-05-18T01:57:52.773818Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:52.773818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dead Zones around Young Stellar Objects: FU Orionis Outbursts and Transition Discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"J. E. Pringle, Mario Livio, Rebecca G. Martin, Stephen H. Lubow","submitted_at":"2012-04-13T11:46:37Z","abstract_excerpt":"We perform global time-dependent simulations of an accretion disc around a young stellar object with a dead zone (a region where the magneto-rotational instability cannot drive turbulence because the material is not sufficiently ionised). For infall accretion rates on to the disc of around 10^-7 Msun/yr, dead zones occur if the critical magnetic Reynolds number is larger than about 10^4. We model the collapse of a molecular gas cloud. At early times when the infall accretion rate is high, the disc is thermally ionised and fully turbulent. However, as the infall accretion rate drops, a dead zon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.2959","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":"1204.2959","created_at":"2026-05-18T01:57:52.773895+00:00"},{"alias_kind":"arxiv_version","alias_value":"1204.2959v1","created_at":"2026-05-18T01:57:52.773895+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.2959","created_at":"2026-05-18T01:57:52.773895+00:00"},{"alias_kind":"pith_short_12","alias_value":"2HFW4ERK3JOS","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_16","alias_value":"2HFW4ERK3JOST7EZ","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_8","alias_value":"2HFW4ERK","created_at":"2026-05-18T12:26:50.516681+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/2HFW4ERK3JOST7EZLFNBKTMR4T","json":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T.json","graph_json":"https://pith.science/api/pith-number/2HFW4ERK3JOST7EZLFNBKTMR4T/graph.json","events_json":"https://pith.science/api/pith-number/2HFW4ERK3JOST7EZLFNBKTMR4T/events.json","paper":"https://pith.science/paper/2HFW4ERK"},"agent_actions":{"view_html":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T","download_json":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T.json","view_paper":"https://pith.science/paper/2HFW4ERK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1204.2959&json=true","fetch_graph":"https://pith.science/api/pith-number/2HFW4ERK3JOST7EZLFNBKTMR4T/graph.json","fetch_events":"https://pith.science/api/pith-number/2HFW4ERK3JOST7EZLFNBKTMR4T/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T/action/storage_attestation","attest_author":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T/action/author_attestation","sign_citation":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T/action/citation_signature","submit_replication":"https://pith.science/pith/2HFW4ERK3JOST7EZLFNBKTMR4T/action/replication_record"}},"created_at":"2026-05-18T01:57:52.773895+00:00","updated_at":"2026-05-18T01:57:52.773895+00:00"}