{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2K5WLBQ4VDRYF2T3U24IOE5UPP","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"7db5fe669c6f2c0ad72c9cf8f9d838fd3903cbd54f0749de452fa54185533e8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-21T20:00:06Z","title_canon_sha256":"824c24568f128b6b7af528e65e046866ef1c7501ed099d66388c9c419f999706"},"schema_version":"1.0","source":{"id":"1306.5241","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.5241","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"arxiv_version","alias_value":"1306.5241v1","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.5241","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"pith_short_12","alias_value":"2K5WLBQ4VDRY","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2K5WLBQ4VDRYF2T3","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2K5WLBQ4","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:a764bfa6020f577f54686b7f14c1c200f550d56eb5e12ad449f289e99416c199","target":"graph","created_at":"2026-05-18T01:49:13Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Circumbinary planets have been observed at orbital radii where binary perturbations may have significant effects on the gas disk structure, on planetesimal velocity dispersion, and on the coupling between turbulence and planetesimals. Here, we note that the impact of all of these effects on planet formation is qualitatively altered if the circumbinary disk structure is layered, with a non-turbulent midplane layer (dead zone) and strongly turbulent surface layers. For close binaries, we find that the dead zone typically extends from a radius close to the inner disk edge up to a radius of around","authors_text":"Philip J. Armitage, Rebecca G. Martin, Richard D. Alexander","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-21T20:00:06Z","title":"Formation of circumbinary planets in a dead zone"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.5241","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9dafd7fc709f7aa81f88271b7a640a39d4d49ed8b82d210f1e02ef697883e9e3","target":"record","created_at":"2026-05-18T01:49:13Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"7db5fe669c6f2c0ad72c9cf8f9d838fd3903cbd54f0749de452fa54185533e8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-21T20:00:06Z","title_canon_sha256":"824c24568f128b6b7af528e65e046866ef1c7501ed099d66388c9c419f999706"},"schema_version":"1.0","source":{"id":"1306.5241","kind":"arxiv","version":1}},"canonical_sha256":"d2bb65861ca8e382ea7ba6b88713b47bee4c14387ea9c86c96f72a8b0b9119c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2bb65861ca8e382ea7ba6b88713b47bee4c14387ea9c86c96f72a8b0b9119c1","first_computed_at":"2026-05-18T01:49:13.814198Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:13.814198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7hZUPMPLZHBfGCMxCAfFNi1HXvcTKtSa38etkDu/m6e3gEFFZTs7lVwSIECbxlXmnGrSgY3IQz7hGY6U0aOPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:13.814825Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.5241","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9dafd7fc709f7aa81f88271b7a640a39d4d49ed8b82d210f1e02ef697883e9e3","sha256:a764bfa6020f577f54686b7f14c1c200f550d56eb5e12ad449f289e99416c199"],"state_sha256":"4f3d5baaae38c84c03e3a52c854dd04f216ac6df61c648d3917c4f3b16bc1216"}