{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:YNEY5H7OCKBUFNNGQPBJG7IIYS","short_pith_number":"pith:YNEY5H7O","schema_version":"1.0","canonical_sha256":"c3498e9fee128342b5a683c2937d08c4bf41a60e2ec2e6007103fb3797bedb6b","source":{"kind":"arxiv","id":"1512.01597","version":2},"attestation_state":"computed","paper":{"title":"Can non-ideal magnetohydrodynamics solve the magnetic braking catastrophe?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Daniel J. Price, James Wurster, Matthew R. Bate","submitted_at":"2015-12-05T00:11:41Z","abstract_excerpt":"We investigate whether or not the low ionisation fractions in molecular cloud cores can solve the `magnetic braking catastrophe', where magnetic fields prevent the formation of circumstellar discs around young stars. We perform three-dimensional smoothed particle non-ideal magnetohydrodynamics (MHD) simulations of the gravitational collapse of one solar mass molecular cloud cores, incorporating the effects of ambipolar diffusion, Ohmic resistivity and the Hall effect alongside a self-consistent calculation of the ionisation chemistry assuming 0.1 micron grains. When including only ambipolar di"},"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":"1512.01597","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-05T00:11:41Z","cross_cats_sorted":[],"title_canon_sha256":"794b84e2c463a6f0129c7b1dfec40a389fdf7f91c0b1943de0a09528e96d5b45","abstract_canon_sha256":"987824ea564e94e1e6b0a727b9c499c9a6a52634acbcde28b147106ddbda2b94"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:26.194497Z","signature_b64":"guP6CjWlE5XUdGysjXQX+RFK+/DvYlyjwo749SxwudBC8CPjhx2KzszNm/45D2fG41B2JNVniKUleRNGbvJNAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c3498e9fee128342b5a683c2937d08c4bf41a60e2ec2e6007103fb3797bedb6b","last_reissued_at":"2026-05-18T01:21:26.193788Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:26.193788Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Can non-ideal magnetohydrodynamics solve the magnetic braking catastrophe?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Daniel J. Price, James Wurster, Matthew R. Bate","submitted_at":"2015-12-05T00:11:41Z","abstract_excerpt":"We investigate whether or not the low ionisation fractions in molecular cloud cores can solve the `magnetic braking catastrophe', where magnetic fields prevent the formation of circumstellar discs around young stars. We perform three-dimensional smoothed particle non-ideal magnetohydrodynamics (MHD) simulations of the gravitational collapse of one solar mass molecular cloud cores, incorporating the effects of ambipolar diffusion, Ohmic resistivity and the Hall effect alongside a self-consistent calculation of the ionisation chemistry assuming 0.1 micron grains. When including only ambipolar di"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.01597","kind":"arxiv","version":2},"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":"1512.01597","created_at":"2026-05-18T01:21:26.193905+00:00"},{"alias_kind":"arxiv_version","alias_value":"1512.01597v2","created_at":"2026-05-18T01:21:26.193905+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.01597","created_at":"2026-05-18T01:21:26.193905+00:00"},{"alias_kind":"pith_short_12","alias_value":"YNEY5H7OCKBU","created_at":"2026-05-18T12:29:50.041715+00:00"},{"alias_kind":"pith_short_16","alias_value":"YNEY5H7OCKBUFNNG","created_at":"2026-05-18T12:29:50.041715+00:00"},{"alias_kind":"pith_short_8","alias_value":"YNEY5H7O","created_at":"2026-05-18T12:29:50.041715+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/YNEY5H7OCKBUFNNGQPBJG7IIYS","json":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS.json","graph_json":"https://pith.science/api/pith-number/YNEY5H7OCKBUFNNGQPBJG7IIYS/graph.json","events_json":"https://pith.science/api/pith-number/YNEY5H7OCKBUFNNGQPBJG7IIYS/events.json","paper":"https://pith.science/paper/YNEY5H7O"},"agent_actions":{"view_html":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS","download_json":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS.json","view_paper":"https://pith.science/paper/YNEY5H7O","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1512.01597&json=true","fetch_graph":"https://pith.science/api/pith-number/YNEY5H7OCKBUFNNGQPBJG7IIYS/graph.json","fetch_events":"https://pith.science/api/pith-number/YNEY5H7OCKBUFNNGQPBJG7IIYS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS/action/storage_attestation","attest_author":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS/action/author_attestation","sign_citation":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS/action/citation_signature","submit_replication":"https://pith.science/pith/YNEY5H7OCKBUFNNGQPBJG7IIYS/action/replication_record"}},"created_at":"2026-05-18T01:21:26.193905+00:00","updated_at":"2026-05-18T01:21:26.193905+00:00"}