{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QKMRIGSG5MSBJJLHNH3Y6ZP4U6","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":"1030e05726ce13653d1f5919d7d952be32bba598194d6a254b2a2de4fba061b2","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-21T15:16:27Z","title_canon_sha256":"d24c9ab6ec75a92804d079b68c22198c972eb117fc9b559296b2dda67557c3c4"},"schema_version":"1.0","source":{"id":"2004.10094","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.10094","created_at":"2026-07-05T01:02:46Z"},{"alias_kind":"arxiv_version","alias_value":"2004.10094v2","created_at":"2026-07-05T01:02:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.10094","created_at":"2026-07-05T01:02:46Z"},{"alias_kind":"pith_short_12","alias_value":"QKMRIGSG5MSB","created_at":"2026-07-05T01:02:46Z"},{"alias_kind":"pith_short_16","alias_value":"QKMRIGSG5MSBJJLH","created_at":"2026-07-05T01:02:46Z"},{"alias_kind":"pith_short_8","alias_value":"QKMRIGSG","created_at":"2026-07-05T01:02:46Z"}],"graph_snapshots":[{"event_id":"sha256:c95c76f6480ac93e90eef033f025a2709c0fbdac41f7f84835f32a7f0bc5e9fd","target":"graph","created_at":"2026-07-05T01:02:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.10094/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Dark rings with bright rims are the indirect signposts of planets embedded in protoplanetary discs. In a recent first, an azimuthally elongated AU-scale blob, possibly a planet, was resolved with ALMA in TW Hya. The blob is at the edge of a cliff-like rollover in the dust disc rather than inside a dark ring. Here we build time-dependent models of TW Hya disc. We find that the classical paradigm cannot account for the morphology of the disc and the blob. We propose that ALMA-discovered blob hides a Neptune mass planet losing gas and dust. We show that radial drift of mm-sized dust particles nat","authors_text":"Allona Vazan, Cassandra Hall, Farzana Meru, Jack Humphries, Olja Panic, Patrick Neunteufel, Ravit Helled, Sergei Nayakshin, Takashi Tsukagoshi","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-21T15:16:27Z","title":"TW Hya: an old protoplanetary disc revived by its planet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.10094","kind":"arxiv","version":2},"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:b0ceadc9c64fccd4db0d342e842e86a140f70338dc5d2026c6fc182c383745df","target":"record","created_at":"2026-07-05T01:02:46Z","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":"1030e05726ce13653d1f5919d7d952be32bba598194d6a254b2a2de4fba061b2","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-21T15:16:27Z","title_canon_sha256":"d24c9ab6ec75a92804d079b68c22198c972eb117fc9b559296b2dda67557c3c4"},"schema_version":"1.0","source":{"id":"2004.10094","kind":"arxiv","version":2}},"canonical_sha256":"8299141a46eb2414a56769f78f65fca7953d46eaca351e69311d701a0b8a6b51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8299141a46eb2414a56769f78f65fca7953d46eaca351e69311d701a0b8a6b51","first_computed_at":"2026-07-05T01:02:46.465170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:02:46.465170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j0I0NaVoc9wgGKBYCalG3Cn3cmfP0ehAZqbB0lSmJDciD55PhBaiPhqz2rVi/pGCqlXT8PRSyxRXnMXRdrOECQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:02:46.465735Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.10094","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0ceadc9c64fccd4db0d342e842e86a140f70338dc5d2026c6fc182c383745df","sha256:c95c76f6480ac93e90eef033f025a2709c0fbdac41f7f84835f32a7f0bc5e9fd"],"state_sha256":"3e80998df6c26947ea1ec645ace891d357b881575cce4642503128515e3d2b08"}