{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:O66K7L4UFBRKBFI7ARV6XMCTIX","short_pith_number":"pith:O66K7L4U","canonical_record":{"source":{"id":"1903.02735","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-07T05:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"da271d92049c1bc2646e799dc490c3c811dc057c7c9675ddbf6b8a5d9881017a","abstract_canon_sha256":"32b8c94da4131f038b556b349f57ec33d14ac2ca304ce91791fded4014e20e0a"},"schema_version":"1.0"},"canonical_sha256":"77bcafaf942862a0951f046bebb05345d05be295e897ab4ef077f34801885d5f","source":{"kind":"arxiv","id":"1903.02735","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02735","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02735v1","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02735","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"O66K7L4UFBRK","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"O66K7L4UFBRKBFI7","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"O66K7L4U","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:O66K7L4UFBRKBFI7ARV6XMCTIX","target":"record","payload":{"canonical_record":{"source":{"id":"1903.02735","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-07T05:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"da271d92049c1bc2646e799dc490c3c811dc057c7c9675ddbf6b8a5d9881017a","abstract_canon_sha256":"32b8c94da4131f038b556b349f57ec33d14ac2ca304ce91791fded4014e20e0a"},"schema_version":"1.0"},"canonical_sha256":"77bcafaf942862a0951f046bebb05345d05be295e897ab4ef077f34801885d5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:55.255086Z","signature_b64":"PLhJv+QH8YGoZvzBIpqHVu/L9VArdKLb+VSg1ATpbiLwo3DBGb8UX9aGIjGylu9wo8g1otp/diircD8JSaAMBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"77bcafaf942862a0951f046bebb05345d05be295e897ab4ef077f34801885d5f","last_reissued_at":"2026-05-17T23:50:55.254363Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:55.254363Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.02735","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ggjWpV1oiNwFEBcs+5e6ddaf0uo2KC2UbZdFy+BF889OO6LExdBJGuFY2AOZqtA0BSGb6XL0Pgfl2oQtPBWpBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:01:42.031232Z"},"content_sha256":"e0a8044d82c42f241c4766a7742b06ad7a6f12c6d5a782e230abae268cb78768","schema_version":"1.0","event_id":"sha256:e0a8044d82c42f241c4766a7742b06ad7a6f12c6d5a782e230abae268cb78768"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:O66K7L4UFBRKBFI7ARV6XMCTIX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Li-age correlation: the Sun is unusually Li deficient for its age","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Alves-Brito, D. Yong, I. Ramirez, J. L. Bean, J. Melendez, J. Yana Galarza, L. A. dos Santos, L. Spina, M. Asplund, M. Bedell, M. Carlos","submitted_at":"2019-03-07T05:44:08Z","abstract_excerpt":"The present work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region of the asymmetric 6707.75 \\AA Li I line for a sample of 77 stars plus the Sun. As in previous works based on a smaller sample of solar twins, we find a strong correlation between Li depletion and stellar age. In addition, for the first time we show that the Sun has the lowest Li abundance in comparison with solar twins at similar age (4.6 $\\pm$ 0.5 Gyr). We compare the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02735","kind":"arxiv","version":1},"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":"2026-05-17T23:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pyJQ4xH4MdhqV/shBxcVanlrrz3eD7KACueo+K3t0DwFhXRGEhCoioirVdUiFkzg/vJMM0HmZkgiJEpdPslvCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:01:42.031911Z"},"content_sha256":"1f0e3dcf26ddb1629f8b209daa6673f3bf01996e355e40c831d4f05cff0674b2","schema_version":"1.0","event_id":"sha256:1f0e3dcf26ddb1629f8b209daa6673f3bf01996e355e40c831d4f05cff0674b2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/bundle.json","state_url":"https://pith.science/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/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":"2026-05-26T03:01:42Z","links":{"resolver":"https://pith.science/pith/O66K7L4UFBRKBFI7ARV6XMCTIX","bundle":"https://pith.science/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/bundle.json","state":"https://pith.science/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O66K7L4UFBRKBFI7ARV6XMCTIX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:O66K7L4UFBRKBFI7ARV6XMCTIX","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":"32b8c94da4131f038b556b349f57ec33d14ac2ca304ce91791fded4014e20e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-07T05:44:08Z","title_canon_sha256":"da271d92049c1bc2646e799dc490c3c811dc057c7c9675ddbf6b8a5d9881017a"},"schema_version":"1.0","source":{"id":"1903.02735","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02735","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02735v1","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02735","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"O66K7L4UFBRK","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"O66K7L4UFBRKBFI7","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"O66K7L4U","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:1f0e3dcf26ddb1629f8b209daa6673f3bf01996e355e40c831d4f05cff0674b2","target":"graph","created_at":"2026-05-17T23:50:55Z","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 present work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region of the asymmetric 6707.75 \\AA Li I line for a sample of 77 stars plus the Sun. As in previous works based on a smaller sample of solar twins, we find a strong correlation between Li depletion and stellar age. In addition, for the first time we show that the Sun has the lowest Li abundance in comparison with solar twins at similar age (4.6 $\\pm$ 0.5 Gyr). We compare the ","authors_text":"A. Alves-Brito, D. Yong, I. Ramirez, J. L. Bean, J. Melendez, J. Yana Galarza, L. A. dos Santos, L. Spina, M. Asplund, M. Bedell, M. Carlos","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-07T05:44:08Z","title":"The Li-age correlation: the Sun is unusually Li deficient for its age"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02735","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:e0a8044d82c42f241c4766a7742b06ad7a6f12c6d5a782e230abae268cb78768","target":"record","created_at":"2026-05-17T23:50:55Z","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":"32b8c94da4131f038b556b349f57ec33d14ac2ca304ce91791fded4014e20e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-07T05:44:08Z","title_canon_sha256":"da271d92049c1bc2646e799dc490c3c811dc057c7c9675ddbf6b8a5d9881017a"},"schema_version":"1.0","source":{"id":"1903.02735","kind":"arxiv","version":1}},"canonical_sha256":"77bcafaf942862a0951f046bebb05345d05be295e897ab4ef077f34801885d5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"77bcafaf942862a0951f046bebb05345d05be295e897ab4ef077f34801885d5f","first_computed_at":"2026-05-17T23:50:55.254363Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:55.254363Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PLhJv+QH8YGoZvzBIpqHVu/L9VArdKLb+VSg1ATpbiLwo3DBGb8UX9aGIjGylu9wo8g1otp/diircD8JSaAMBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:55.255086Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.02735","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e0a8044d82c42f241c4766a7742b06ad7a6f12c6d5a782e230abae268cb78768","sha256:1f0e3dcf26ddb1629f8b209daa6673f3bf01996e355e40c831d4f05cff0674b2"],"state_sha256":"7c78a09a132f2f5c9036dbb079c4a69dbe118d8580e79c2729866802f1a6be4d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"600gCD8+oGG8xqU5xc5JDhobJaDhFDHYd/Pv9hCnPD7Lk4CiUqMjjCDOdLZs4fnivn/p7i7CanD46Q+6nvKZDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:01:42.035560Z","bundle_sha256":"f5f01b14f992b6974129673b8825b98eefa6212eb8b4eda9d8fc7201e06583eb"}}