{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:RAGCHNUZMVCLBUML4HKJTVQ3K6","short_pith_number":"pith:RAGCHNUZ","canonical_record":{"source":{"id":"1702.03386","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-02-11T06:15:54Z","cross_cats_sorted":[],"title_canon_sha256":"eabbfc2afd762bc977a86dab85906ac1ea29854adac1e91e8f13f4ba36840b78","abstract_canon_sha256":"f4ff167c76868d4f7db22d11f3a43c7c2e9289873e1ba3b02961fd4088813196"},"schema_version":"1.0"},"canonical_sha256":"880c23b6996544b0d18be1d499d61b579477a4c3635f14dd05c1108ca226a9fb","source":{"kind":"arxiv","id":"1702.03386","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.03386","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"arxiv_version","alias_value":"1702.03386v2","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.03386","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"pith_short_12","alias_value":"RAGCHNUZMVCL","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RAGCHNUZMVCLBUML","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RAGCHNUZ","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:RAGCHNUZMVCLBUML4HKJTVQ3K6","target":"record","payload":{"canonical_record":{"source":{"id":"1702.03386","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-02-11T06:15:54Z","cross_cats_sorted":[],"title_canon_sha256":"eabbfc2afd762bc977a86dab85906ac1ea29854adac1e91e8f13f4ba36840b78","abstract_canon_sha256":"f4ff167c76868d4f7db22d11f3a43c7c2e9289873e1ba3b02961fd4088813196"},"schema_version":"1.0"},"canonical_sha256":"880c23b6996544b0d18be1d499d61b579477a4c3635f14dd05c1108ca226a9fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:19.283725Z","signature_b64":"Yf8CWCbSO0YBNWrnzJmRMjWozLF8k5J3bV5w9OPxMzRcWVk5fcLegN5lczcfBI3e5AO0E1FCOD0xP+9NmyNMDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"880c23b6996544b0d18be1d499d61b579477a4c3635f14dd05c1108ca226a9fb","last_reissued_at":"2026-05-18T00:40:19.282984Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:19.282984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.03386","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R2bu0NRPFeI5QshkIVs9ZMDvo7h4vb7xVPLGpES0j26oK6HNj7GXHBkItqUuJuyWhxXWcUupO69abVyD0tZdAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T00:40:35.684513Z"},"content_sha256":"757697a95507fb8d035bed1d8f4b506acecb8240f709a10d73fe898a52750259","schema_version":"1.0","event_id":"sha256:757697a95507fb8d035bed1d8f4b506acecb8240f709a10d73fe898a52750259"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:RAGCHNUZMVCLBUML4HKJTVQ3K6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The cosmic shoreline: the evidence that escape determines which planets have atmospheres, and what this may mean for Proxima Centauri b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"David C. Catling, Kevin J. Zahnle","submitted_at":"2017-02-11T06:15:54Z","abstract_excerpt":"The planets of the Solar System divide neatly between those with atmospheres and those without when arranged by insolation ($I$) and escape velocity ($v_{\\mathrm{esc}}$). The dividing line goes as $I \\propto v_{\\mathrm{esc}}^4$. Exoplanets with reported masses and radii are shown to crowd against the extrapolation of the Solar System trend, making a metaphorical cosmic shoreline that unites all the planets. The $I \\propto v_{\\mathrm{esc}}^4$ relation may implicate thermal escape. We therefore address the general behavior of hydrodynamic thermal escape models ranging from Pluto to highly-irradi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.03386","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:40:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yQD6exVVul3EcjbdLiRsz0mLxhom5VkvOUCTNUFdHuwfGM8Paadan+l0GR/GQ6JYjEcP8HARSJDDkPl678I2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T00:40:35.684867Z"},"content_sha256":"d64ba31bb977678f58673b0558ddb48ef97cda8f4d60193d696dc6e0d3e6d6cc","schema_version":"1.0","event_id":"sha256:d64ba31bb977678f58673b0558ddb48ef97cda8f4d60193d696dc6e0d3e6d6cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/bundle.json","state_url":"https://pith.science/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T00:40:35Z","links":{"resolver":"https://pith.science/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6","bundle":"https://pith.science/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/bundle.json","state":"https://pith.science/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RAGCHNUZMVCLBUML4HKJTVQ3K6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:RAGCHNUZMVCLBUML4HKJTVQ3K6","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":"f4ff167c76868d4f7db22d11f3a43c7c2e9289873e1ba3b02961fd4088813196","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-02-11T06:15:54Z","title_canon_sha256":"eabbfc2afd762bc977a86dab85906ac1ea29854adac1e91e8f13f4ba36840b78"},"schema_version":"1.0","source":{"id":"1702.03386","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.03386","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"arxiv_version","alias_value":"1702.03386v2","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.03386","created_at":"2026-05-18T00:40:19Z"},{"alias_kind":"pith_short_12","alias_value":"RAGCHNUZMVCL","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RAGCHNUZMVCLBUML","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RAGCHNUZ","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:d64ba31bb977678f58673b0558ddb48ef97cda8f4d60193d696dc6e0d3e6d6cc","target":"graph","created_at":"2026-05-18T00:40:19Z","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":"The planets of the Solar System divide neatly between those with atmospheres and those without when arranged by insolation ($I$) and escape velocity ($v_{\\mathrm{esc}}$). The dividing line goes as $I \\propto v_{\\mathrm{esc}}^4$. Exoplanets with reported masses and radii are shown to crowd against the extrapolation of the Solar System trend, making a metaphorical cosmic shoreline that unites all the planets. The $I \\propto v_{\\mathrm{esc}}^4$ relation may implicate thermal escape. We therefore address the general behavior of hydrodynamic thermal escape models ranging from Pluto to highly-irradi","authors_text":"David C. Catling, Kevin J. Zahnle","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-02-11T06:15:54Z","title":"The cosmic shoreline: the evidence that escape determines which planets have atmospheres, and what this may mean for Proxima Centauri b"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.03386","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":"sha256:757697a95507fb8d035bed1d8f4b506acecb8240f709a10d73fe898a52750259","target":"record","created_at":"2026-05-18T00:40:19Z","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":"f4ff167c76868d4f7db22d11f3a43c7c2e9289873e1ba3b02961fd4088813196","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-02-11T06:15:54Z","title_canon_sha256":"eabbfc2afd762bc977a86dab85906ac1ea29854adac1e91e8f13f4ba36840b78"},"schema_version":"1.0","source":{"id":"1702.03386","kind":"arxiv","version":2}},"canonical_sha256":"880c23b6996544b0d18be1d499d61b579477a4c3635f14dd05c1108ca226a9fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"880c23b6996544b0d18be1d499d61b579477a4c3635f14dd05c1108ca226a9fb","first_computed_at":"2026-05-18T00:40:19.282984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:19.282984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yf8CWCbSO0YBNWrnzJmRMjWozLF8k5J3bV5w9OPxMzRcWVk5fcLegN5lczcfBI3e5AO0E1FCOD0xP+9NmyNMDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:19.283725Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.03386","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:757697a95507fb8d035bed1d8f4b506acecb8240f709a10d73fe898a52750259","sha256:d64ba31bb977678f58673b0558ddb48ef97cda8f4d60193d696dc6e0d3e6d6cc"],"state_sha256":"58e54b4cbf92be3e0bc026d0807d1ed10448079f7513f0d71fbd65359317b050"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cfbmWJYpTNEZQZnJVEtODdmpiXU1PzPtFMnLHFpi1PQXLjCL5D3aRWn+mnGpmpjHaUKbClRS0/3WcX9VvokCAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T00:40:35.686807Z","bundle_sha256":"7f5bbb9479ec3b9d764eea781810343c97a4f1a9ae85010aa3aa1f5ce87cf8bc"}}