{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:LKBIS3HIH6BGNOSPLN3X4LGZ6O","short_pith_number":"pith:LKBIS3HI","canonical_record":{"source":{"id":"1609.03379","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-12T13:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"754e60befa7552d18e323414f4e690b11c414eebeadb5998eaea2a6bb4bab5bc","abstract_canon_sha256":"8422be4141d2f6b8bf6135c905431434338187aa5677e2c69f065996c49d7ab3"},"schema_version":"1.0"},"canonical_sha256":"5a82896ce83f8266ba4f5b777e2cd9f3ba2adde0b83dd33d2a5e9c21505fd465","source":{"kind":"arxiv","id":"1609.03379","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.03379","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"arxiv_version","alias_value":"1609.03379v1","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.03379","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"pith_short_12","alias_value":"LKBIS3HIH6BG","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LKBIS3HIH6BGNOSP","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LKBIS3HI","created_at":"2026-05-18T12:30:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:LKBIS3HIH6BGNOSPLN3X4LGZ6O","target":"record","payload":{"canonical_record":{"source":{"id":"1609.03379","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-12T13:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"754e60befa7552d18e323414f4e690b11c414eebeadb5998eaea2a6bb4bab5bc","abstract_canon_sha256":"8422be4141d2f6b8bf6135c905431434338187aa5677e2c69f065996c49d7ab3"},"schema_version":"1.0"},"canonical_sha256":"5a82896ce83f8266ba4f5b777e2cd9f3ba2adde0b83dd33d2a5e9c21505fd465","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:56:19.563411Z","signature_b64":"ApATQViGWId/cOxuKqxxTW7ZHUdYS0lZZz9f0r9Q+657VihJrUI1va8BZs2BgoKLmg/bljlejJa7rOZxY3+KBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a82896ce83f8266ba4f5b777e2cd9f3ba2adde0b83dd33d2a5e9c21505fd465","last_reissued_at":"2026-05-18T00:56:19.562621Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:56:19.562621Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.03379","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":"2026-05-18T00:56:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WJ5dpeWkf1RPIyycshaGV7d2JvWph4uv2huJXafGOlgEVoZNzF3q14N6BZ6sdSgbFToBpwyiifsBKqqedFh9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:22:54.099148Z"},"content_sha256":"5bbf86bd6dada2ace63b77a0a9c5821f000b0944c44c37f13de2e81803d4407d","schema_version":"1.0","event_id":"sha256:5bbf86bd6dada2ace63b77a0a9c5821f000b0944c44c37f13de2e81803d4407d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:LKBIS3HIH6BGNOSPLN3X4LGZ6O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The origin of the enhanced metallicity of satellite galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ian G. McCarthy, James W. Trayford, Joop Schaye, Richard G. Bower, Robert A. Crain, Sean L. McGee, Tom Theuns, Yannick M. Bahe","submitted_at":"2016-09-12T13:06:08Z","abstract_excerpt":"Observations of galaxies in the local Universe have shown that both the ionized gas and the stars of satellites are more metal-rich than of equally massive centrals. To gain insight into the connection between this metallicity enhancement and other differences between centrals and satellites, such as their star formation rates, gas content, and growth history, we study the metallicities of >3600 galaxies with M_star > 10^10 M_sun in the cosmological hydrodynamical EAGLE 100 Mpc `Reference' simulation, including ~1500 in the vicinity of galaxy groups and clusters (M_200 >= 10^13 M_sun). The sim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.03379","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":"2026-05-18T00:56:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3QisjtfiVP92IzMjUgwFrhH+Uu8UCTxXtOtPI4viYytKgf7pcqGYth+jfq+Ivv2thmiFXmVD65JJO7XEPaasCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:22:54.099507Z"},"content_sha256":"c6fb769f0e2a9f4e6a4210226a3cab8abb89b8ac153ef86aa09874929f19cef0","schema_version":"1.0","event_id":"sha256:c6fb769f0e2a9f4e6a4210226a3cab8abb89b8ac153ef86aa09874929f19cef0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/bundle.json","state_url":"https://pith.science/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/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":"2026-06-02T10:22:54Z","links":{"resolver":"https://pith.science/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O","bundle":"https://pith.science/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/bundle.json","state":"https://pith.science/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LKBIS3HIH6BGNOSPLN3X4LGZ6O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:LKBIS3HIH6BGNOSPLN3X4LGZ6O","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":"8422be4141d2f6b8bf6135c905431434338187aa5677e2c69f065996c49d7ab3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-12T13:06:08Z","title_canon_sha256":"754e60befa7552d18e323414f4e690b11c414eebeadb5998eaea2a6bb4bab5bc"},"schema_version":"1.0","source":{"id":"1609.03379","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.03379","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"arxiv_version","alias_value":"1609.03379v1","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.03379","created_at":"2026-05-18T00:56:19Z"},{"alias_kind":"pith_short_12","alias_value":"LKBIS3HIH6BG","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LKBIS3HIH6BGNOSP","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LKBIS3HI","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:c6fb769f0e2a9f4e6a4210226a3cab8abb89b8ac153ef86aa09874929f19cef0","target":"graph","created_at":"2026-05-18T00:56:19Z","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":"Observations of galaxies in the local Universe have shown that both the ionized gas and the stars of satellites are more metal-rich than of equally massive centrals. To gain insight into the connection between this metallicity enhancement and other differences between centrals and satellites, such as their star formation rates, gas content, and growth history, we study the metallicities of >3600 galaxies with M_star > 10^10 M_sun in the cosmological hydrodynamical EAGLE 100 Mpc `Reference' simulation, including ~1500 in the vicinity of galaxy groups and clusters (M_200 >= 10^13 M_sun). The sim","authors_text":"Ian G. McCarthy, James W. Trayford, Joop Schaye, Richard G. Bower, Robert A. Crain, Sean L. McGee, Tom Theuns, Yannick M. Bahe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-12T13:06:08Z","title":"The origin of the enhanced metallicity of satellite galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.03379","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":"sha256:5bbf86bd6dada2ace63b77a0a9c5821f000b0944c44c37f13de2e81803d4407d","target":"record","created_at":"2026-05-18T00:56:19Z","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":"8422be4141d2f6b8bf6135c905431434338187aa5677e2c69f065996c49d7ab3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-12T13:06:08Z","title_canon_sha256":"754e60befa7552d18e323414f4e690b11c414eebeadb5998eaea2a6bb4bab5bc"},"schema_version":"1.0","source":{"id":"1609.03379","kind":"arxiv","version":1}},"canonical_sha256":"5a82896ce83f8266ba4f5b777e2cd9f3ba2adde0b83dd33d2a5e9c21505fd465","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a82896ce83f8266ba4f5b777e2cd9f3ba2adde0b83dd33d2a5e9c21505fd465","first_computed_at":"2026-05-18T00:56:19.562621Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:19.562621Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ApATQViGWId/cOxuKqxxTW7ZHUdYS0lZZz9f0r9Q+657VihJrUI1va8BZs2BgoKLmg/bljlejJa7rOZxY3+KBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:19.563411Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.03379","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bbf86bd6dada2ace63b77a0a9c5821f000b0944c44c37f13de2e81803d4407d","sha256:c6fb769f0e2a9f4e6a4210226a3cab8abb89b8ac153ef86aa09874929f19cef0"],"state_sha256":"fb64657a503d9b631e16e7fdcd97fe2ae8bf1a8170a5dc3524cb5d375df1a069"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MflUNcRKFJqm2fY5szyL45Smv7GMpkuoDIgpXdc1zLzTCo2uF8dsDR7Q7LKre7RYmx4ifgsWcTXwOYYyKfSKDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T10:22:54.101421Z","bundle_sha256":"d626c1775115641f56fed52ec388b58265d8cde3661691daa5f4467b4236c0e1"}}