{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FAWTOLUENDML4JGCGFR6TZ3OGI","short_pith_number":"pith:FAWTOLUE","canonical_record":{"source":{"id":"1801.00748","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-01-02T17:51:00Z","cross_cats_sorted":[],"title_canon_sha256":"f79a7fbb2fa876c650c8e844ed4e93e7f4e8d31cd6b629e14ad70a2506e5bd90","abstract_canon_sha256":"f500d1baf9be1fdc1c5d06416aecfa579b348cdd3025cdfbe562631488394ca0"},"schema_version":"1.0"},"canonical_sha256":"282d372e8468d8be24c23163e9e76e323c3504dac0f693a23218061ef8f9cd72","source":{"kind":"arxiv","id":"1801.00748","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.00748","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"arxiv_version","alias_value":"1801.00748v2","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.00748","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"pith_short_12","alias_value":"FAWTOLUENDML","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FAWTOLUENDML4JGC","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FAWTOLUE","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FAWTOLUENDML4JGCGFR6TZ3OGI","target":"record","payload":{"canonical_record":{"source":{"id":"1801.00748","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-01-02T17:51:00Z","cross_cats_sorted":[],"title_canon_sha256":"f79a7fbb2fa876c650c8e844ed4e93e7f4e8d31cd6b629e14ad70a2506e5bd90","abstract_canon_sha256":"f500d1baf9be1fdc1c5d06416aecfa579b348cdd3025cdfbe562631488394ca0"},"schema_version":"1.0"},"canonical_sha256":"282d372e8468d8be24c23163e9e76e323c3504dac0f693a23218061ef8f9cd72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:46.357451Z","signature_b64":"vXqDKVykCWwDg6jQGQL75+KROCNW9FtlSWkevId5DGYXQ4FVkkezUdLmnM0NX8YEjL314J9TeXVtoB9U2UC/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"282d372e8468d8be24c23163e9e76e323c3504dac0f693a23218061ef8f9cd72","last_reissued_at":"2026-05-18T00:06:46.356923Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:46.356923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.00748","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":"2026-05-18T00:06:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eP+RuiuKXRHeIE6HzCAot+Il2jQXRidgwWaSkNpNk7l27/OsfhJKCzEfax7m4G3Bwcmv2VUxhhr+QcWKdNFsAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T03:47:29.768080Z"},"content_sha256":"d244b45840c0bc95323d5e6bc8a10d75761a9fc755c9ea02b52773b28922fccf","schema_version":"1.0","event_id":"sha256:d244b45840c0bc95323d5e6bc8a10d75761a9fc755c9ea02b52773b28922fccf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FAWTOLUENDML4JGCGFR6TZ3OGI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Habitability of Exoplanet Waterworlds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Edwin S. Kite, Eric B. Ford","submitted_at":"2018-01-02T17:51:00Z","abstract_excerpt":"Many habitable zone exoplanets are expected to form with water mass fractions higher than that of the Earth. For rocky exoplanets with 10-1000x Earth's H2O but without H2, we model the multi-Gyr evolution of ocean temperature and chemistry, taking into account C partitioning, high-pressure ice phases, and atmosphere-lithosphere exchange. Within our model, for Sun-like stars, we find that: (1)~the duration of habitable surface water is strongly affected by ocean chemistry; (2)~possible ocean pH spans a wide range; (3)~surprisingly, many waterworlds retain habitable surface water for >1 Gyr, and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.00748","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":"2026-05-18T00:06:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8q197dgEmeKRerRaG2FdtZ5/0HiAikiLQMyc4SVf/Bu3D2GPRFZIpaMW2LCsGdwlV8WETodnzN97GRQ2wbCACQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T03:47:29.768759Z"},"content_sha256":"c01e1d359c094125a0314fec104a53f745736f41a8557a766d8ecfc24decf49f","schema_version":"1.0","event_id":"sha256:c01e1d359c094125a0314fec104a53f745736f41a8557a766d8ecfc24decf49f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/bundle.json","state_url":"https://pith.science/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/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":"2026-05-30T03:47:29Z","links":{"resolver":"https://pith.science/pith/FAWTOLUENDML4JGCGFR6TZ3OGI","bundle":"https://pith.science/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/bundle.json","state":"https://pith.science/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FAWTOLUENDML4JGCGFR6TZ3OGI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FAWTOLUENDML4JGCGFR6TZ3OGI","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":"f500d1baf9be1fdc1c5d06416aecfa579b348cdd3025cdfbe562631488394ca0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-01-02T17:51:00Z","title_canon_sha256":"f79a7fbb2fa876c650c8e844ed4e93e7f4e8d31cd6b629e14ad70a2506e5bd90"},"schema_version":"1.0","source":{"id":"1801.00748","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.00748","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"arxiv_version","alias_value":"1801.00748v2","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.00748","created_at":"2026-05-18T00:06:46Z"},{"alias_kind":"pith_short_12","alias_value":"FAWTOLUENDML","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FAWTOLUENDML4JGC","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FAWTOLUE","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:c01e1d359c094125a0314fec104a53f745736f41a8557a766d8ecfc24decf49f","target":"graph","created_at":"2026-05-18T00:06:46Z","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"},"paper":{"abstract_excerpt":"Many habitable zone exoplanets are expected to form with water mass fractions higher than that of the Earth. For rocky exoplanets with 10-1000x Earth's H2O but without H2, we model the multi-Gyr evolution of ocean temperature and chemistry, taking into account C partitioning, high-pressure ice phases, and atmosphere-lithosphere exchange. Within our model, for Sun-like stars, we find that: (1)~the duration of habitable surface water is strongly affected by ocean chemistry; (2)~possible ocean pH spans a wide range; (3)~surprisingly, many waterworlds retain habitable surface water for >1 Gyr, and","authors_text":"Edwin S. Kite, Eric B. Ford","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-01-02T17:51:00Z","title":"Habitability of Exoplanet Waterworlds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.00748","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:d244b45840c0bc95323d5e6bc8a10d75761a9fc755c9ea02b52773b28922fccf","target":"record","created_at":"2026-05-18T00:06:46Z","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":"f500d1baf9be1fdc1c5d06416aecfa579b348cdd3025cdfbe562631488394ca0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-01-02T17:51:00Z","title_canon_sha256":"f79a7fbb2fa876c650c8e844ed4e93e7f4e8d31cd6b629e14ad70a2506e5bd90"},"schema_version":"1.0","source":{"id":"1801.00748","kind":"arxiv","version":2}},"canonical_sha256":"282d372e8468d8be24c23163e9e76e323c3504dac0f693a23218061ef8f9cd72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"282d372e8468d8be24c23163e9e76e323c3504dac0f693a23218061ef8f9cd72","first_computed_at":"2026-05-18T00:06:46.356923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:46.356923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vXqDKVykCWwDg6jQGQL75+KROCNW9FtlSWkevId5DGYXQ4FVkkezUdLmnM0NX8YEjL314J9TeXVtoB9U2UC/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:46.357451Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.00748","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d244b45840c0bc95323d5e6bc8a10d75761a9fc755c9ea02b52773b28922fccf","sha256:c01e1d359c094125a0314fec104a53f745736f41a8557a766d8ecfc24decf49f"],"state_sha256":"3c256a96ed7feec8521a32c43d3098476e4145e432fc759f08f44b43067ba7a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tFSLvGnt4Ww3hyZCPKN54PGGj55ufWRSQTjTOH5fv4MjgJx89pcc82lWjZfzgzhmrmOKHsNCZbsoxywGorJtDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T03:47:29.772380Z","bundle_sha256":"878524266982deb9f743bae4bbe8444c7817b69bfc6d39625da6e2e66cc74844"}}