{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:7ECNWUFIG7SSZLG4RAVN4DG4H2","short_pith_number":"pith:7ECNWUFI","schema_version":"1.0","canonical_sha256":"f904db50a837e52cacdc882ade0cdc3e886879b46cd0cc47207bd3ed8928c98e","source":{"kind":"arxiv","id":"1504.02113","version":2},"attestation_state":"computed","paper":{"title":"Electromagnetic Jets from Stars and Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-th"],"primary_cat":"gr-qc","authors_text":"Alexandru Lupsasca, Maria J. Rodriguez, Samuel E. Gralla","submitted_at":"2015-04-08T20:12:05Z","abstract_excerpt":"We present analytic force-free solutions modeling rotating stars and black holes immersed in the magnetic field of a thin disk that terminates at an inner radius. The solutions are exact in flat spacetime and approximate in Kerr spacetime. The compact object produces a conical jet whose properties carry information about its nature. For example, the jet from a star is surrounded by a current sheet, while that of a black hole is smooth. We compute an effective resistance in each case and compare to the canonical values used in circuit models of energy extraction. These solutions illustrate all "},"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":"1504.02113","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-04-08T20:12:05Z","cross_cats_sorted":["astro-ph.HE","hep-th"],"title_canon_sha256":"f91942eeac1d69d1f18c03066491cc4c26d26fdd18514c7d326f49bf0b6a5793","abstract_canon_sha256":"ecd097cdb95dc5c31a7435810e9fe9720c2f88cc7b5df4901919e76f269c4ef3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:29.601186Z","signature_b64":"1BDBL58jZNHh/KrED+o4Z0/gy0tEEoWU596IQncfhEbkzXhfiex5wm5cidY1L/FuAFZWrgLKAs+C+914/GaaDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f904db50a837e52cacdc882ade0cdc3e886879b46cd0cc47207bd3ed8928c98e","last_reissued_at":"2026-05-18T01:20:29.600585Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:29.600585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Electromagnetic Jets from Stars and Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-th"],"primary_cat":"gr-qc","authors_text":"Alexandru Lupsasca, Maria J. Rodriguez, Samuel E. Gralla","submitted_at":"2015-04-08T20:12:05Z","abstract_excerpt":"We present analytic force-free solutions modeling rotating stars and black holes immersed in the magnetic field of a thin disk that terminates at an inner radius. The solutions are exact in flat spacetime and approximate in Kerr spacetime. The compact object produces a conical jet whose properties carry information about its nature. For example, the jet from a star is surrounded by a current sheet, while that of a black hole is smooth. We compute an effective resistance in each case and compare to the canonical values used in circuit models of energy extraction. These solutions illustrate all "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02113","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":"1504.02113","created_at":"2026-05-18T01:20:29.600672+00:00"},{"alias_kind":"arxiv_version","alias_value":"1504.02113v2","created_at":"2026-05-18T01:20:29.600672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02113","created_at":"2026-05-18T01:20:29.600672+00:00"},{"alias_kind":"pith_short_12","alias_value":"7ECNWUFIG7SS","created_at":"2026-05-18T12:29:10.953037+00:00"},{"alias_kind":"pith_short_16","alias_value":"7ECNWUFIG7SSZLG4","created_at":"2026-05-18T12:29:10.953037+00:00"},{"alias_kind":"pith_short_8","alias_value":"7ECNWUFI","created_at":"2026-05-18T12:29:10.953037+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.08597","citing_title":"General Grad-Shafranov Equation","ref_index":34,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2","json":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2.json","graph_json":"https://pith.science/api/pith-number/7ECNWUFIG7SSZLG4RAVN4DG4H2/graph.json","events_json":"https://pith.science/api/pith-number/7ECNWUFIG7SSZLG4RAVN4DG4H2/events.json","paper":"https://pith.science/paper/7ECNWUFI"},"agent_actions":{"view_html":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2","download_json":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2.json","view_paper":"https://pith.science/paper/7ECNWUFI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1504.02113&json=true","fetch_graph":"https://pith.science/api/pith-number/7ECNWUFIG7SSZLG4RAVN4DG4H2/graph.json","fetch_events":"https://pith.science/api/pith-number/7ECNWUFIG7SSZLG4RAVN4DG4H2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2/action/storage_attestation","attest_author":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2/action/author_attestation","sign_citation":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2/action/citation_signature","submit_replication":"https://pith.science/pith/7ECNWUFIG7SSZLG4RAVN4DG4H2/action/replication_record"}},"created_at":"2026-05-18T01:20:29.600672+00:00","updated_at":"2026-05-18T01:20:29.600672+00:00"}