{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:DA7KZX7O7NQWH3I2TXDWKZQH3D","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":"f163b9fff296b2cf1dbeede49545377af135feb7e0b0d9abe6d6a209be3ffae8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-18T11:12:50Z","title_canon_sha256":"d3b0be06e6da32b44fbdb4e5b2c69ab32f404819ab956defa34ae671380f12bb"},"schema_version":"1.0","source":{"id":"1103.3599","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.3599","created_at":"2026-05-18T02:02:49Z"},{"alias_kind":"arxiv_version","alias_value":"1103.3599v1","created_at":"2026-05-18T02:02:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.3599","created_at":"2026-05-18T02:02:49Z"},{"alias_kind":"pith_short_12","alias_value":"DA7KZX7O7NQW","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DA7KZX7O7NQWH3I2","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DA7KZX7O","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:8d0ab68f7970ebb2ffcb543023dbd57b5c516df20ac35fb2d4dc9de127a340cf","target":"graph","created_at":"2026-05-18T02:02:49Z","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":"We investigate the effects of tidal interactions on the planetary orbits and stellar spin rates of the WASP-18 and WASP-19 planetary systems using a forward integration scheme. By fitting the resulting evolutionary tracks to the observed eccentricity, semi-major axis and stellar rotation rate, and to the stellar age derived from isochronal fitting, we are able to place constraints on the stellar and planetary reduced tidal quality factors, Q's and Q'p. We find that for WASP-18, log(Q's)=8.21+0.90-0.52 and log(Q'p)=7.77+1.54-1.25, implying a system age of 0.579+0.305-0.250 Gyr. For WASP-19 we o","authors_text":"A. Collier Cameron, B. Smalley, C. Hall, D. J. A. Brown, L. Hebb","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-18T11:12:50Z","title":"Are falling planets spinning up their host stars?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.3599","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":"sha256:9e1d0affeb54e0e19d3878e716e2becf7743d3fbd27b587c815e562fc8f1f766","target":"record","created_at":"2026-05-18T02:02:49Z","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":"f163b9fff296b2cf1dbeede49545377af135feb7e0b0d9abe6d6a209be3ffae8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-18T11:12:50Z","title_canon_sha256":"d3b0be06e6da32b44fbdb4e5b2c69ab32f404819ab956defa34ae671380f12bb"},"schema_version":"1.0","source":{"id":"1103.3599","kind":"arxiv","version":1}},"canonical_sha256":"183eacdfeefb6163ed1a9dc7656607d8f423ed26fcdcc29e13adabb868492726","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"183eacdfeefb6163ed1a9dc7656607d8f423ed26fcdcc29e13adabb868492726","first_computed_at":"2026-05-18T02:02:49.945492Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:49.945492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ghjg7CqTZDxhtL7sIJDcsAg+gxN9A7BWcLz6O3+GOcgtYHkSMe5ZkEAB85tabmX37HGfl3d10nSSs0iTolNvCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:49.946120Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.3599","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e1d0affeb54e0e19d3878e716e2becf7743d3fbd27b587c815e562fc8f1f766","sha256:8d0ab68f7970ebb2ffcb543023dbd57b5c516df20ac35fb2d4dc9de127a340cf"],"state_sha256":"274be248c210f77824b39b52c0c5caa15b433e41e4461b84076fa66a82427413"}