{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:K2BZH2LG6DW3M6IFNGAY7H52FC","short_pith_number":"pith:K2BZH2LG","canonical_record":{"source":{"id":"1505.03143","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-12T20:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"39cd455fb2a4734b5cf4b2eb1a3b298d699df1c951820c441c583c17d285a135","abstract_canon_sha256":"61336b81a82e8a8f4df0ab89eb824d01f78a06b3acdea876671b50034e97cb5b"},"schema_version":"1.0"},"canonical_sha256":"568393e966f0edb6790569818f9fba28aba2346ee8a9d0ccea1dd30dd0777982","source":{"kind":"arxiv","id":"1505.03143","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03143","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03143v1","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03143","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"pith_short_12","alias_value":"K2BZH2LG6DW3","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"K2BZH2LG6DW3M6IF","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"K2BZH2LG","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:K2BZH2LG6DW3M6IFNGAY7H52FC","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03143","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-12T20:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"39cd455fb2a4734b5cf4b2eb1a3b298d699df1c951820c441c583c17d285a135","abstract_canon_sha256":"61336b81a82e8a8f4df0ab89eb824d01f78a06b3acdea876671b50034e97cb5b"},"schema_version":"1.0"},"canonical_sha256":"568393e966f0edb6790569818f9fba28aba2346ee8a9d0ccea1dd30dd0777982","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:10.415938Z","signature_b64":"f67IaHriQi6PwUMDBMJN0mL+rMo3jSYD0pYkCYePCHwNEHojCsW2STx257suewWJThggNBhaMZ5jyrEfIS3MBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"568393e966f0edb6790569818f9fba28aba2346ee8a9d0ccea1dd30dd0777982","last_reissued_at":"2026-05-18T02:12:10.415333Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:10.415333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03143","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":"2026-05-18T02:12:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9uumlApsS+aiArS1V35yEIFVIgbFUbs1Bcd9g7+dPwzfcckZMWzb0mcNt1mR6JJ9sU86jeYGMH8UCYWmZhK5DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:23:04.547271Z"},"content_sha256":"1ee6f61a25a49b778ae7191a1f91c07bd51e99138db7a361c38a99feadd13b18","schema_version":"1.0","event_id":"sha256:1ee6f61a25a49b778ae7191a1f91c07bd51e99138db7a361c38a99feadd13b18"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:K2BZH2LG6DW3M6IFNGAY7H52FC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Strangulation as the primary mechanism for shutting down star formation in galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Rachel Cochrane, Roberto Maiolino, Yingjie Peng","submitted_at":"2015-05-12T20:00:19Z","abstract_excerpt":"Local galaxies are broadly divided into two main classes, star-forming (gas-rich) and quiescent (passive and gas-poor). The primary mechanism responsible for quenching star formation in galaxies and transforming them into quiescent and passive systems is still unclear. Sudden removal of gas through outflows or stripping is one of the mechanisms often proposed. An alternative mechanism is so-called \"strangulation\", in which the supply of cold gas to the galaxy is halted. Here we report that the difference between quiescent and star forming galaxies in terms of stellar metallicity (i.e. the frac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03143","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":"2026-05-18T02:12:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hateikA0foPUPrwhNfH9lQeHboQO9epiGpwIfi3By5tcgw9nxJGcKJrfE98vkgF/NmUKmYnkyCPcbHZbSkiGDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:23:04.548030Z"},"content_sha256":"4200c0cabb7319e746aaa0db06b00d7e738a7c1f1b27f8bb35d88a70963be20f","schema_version":"1.0","event_id":"sha256:4200c0cabb7319e746aaa0db06b00d7e738a7c1f1b27f8bb35d88a70963be20f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/bundle.json","state_url":"https://pith.science/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/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":"2026-05-25T22:23:04Z","links":{"resolver":"https://pith.science/pith/K2BZH2LG6DW3M6IFNGAY7H52FC","bundle":"https://pith.science/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/bundle.json","state":"https://pith.science/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K2BZH2LG6DW3M6IFNGAY7H52FC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:K2BZH2LG6DW3M6IFNGAY7H52FC","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":"61336b81a82e8a8f4df0ab89eb824d01f78a06b3acdea876671b50034e97cb5b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-12T20:00:19Z","title_canon_sha256":"39cd455fb2a4734b5cf4b2eb1a3b298d699df1c951820c441c583c17d285a135"},"schema_version":"1.0","source":{"id":"1505.03143","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03143","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03143v1","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03143","created_at":"2026-05-18T02:12:10Z"},{"alias_kind":"pith_short_12","alias_value":"K2BZH2LG6DW3","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"K2BZH2LG6DW3M6IF","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"K2BZH2LG","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:4200c0cabb7319e746aaa0db06b00d7e738a7c1f1b27f8bb35d88a70963be20f","target":"graph","created_at":"2026-05-18T02:12:10Z","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":"Local galaxies are broadly divided into two main classes, star-forming (gas-rich) and quiescent (passive and gas-poor). The primary mechanism responsible for quenching star formation in galaxies and transforming them into quiescent and passive systems is still unclear. Sudden removal of gas through outflows or stripping is one of the mechanisms often proposed. An alternative mechanism is so-called \"strangulation\", in which the supply of cold gas to the galaxy is halted. Here we report that the difference between quiescent and star forming galaxies in terms of stellar metallicity (i.e. the frac","authors_text":"Rachel Cochrane, Roberto Maiolino, Yingjie Peng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-12T20:00:19Z","title":"Strangulation as the primary mechanism for shutting down star formation in galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03143","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":"sha256:1ee6f61a25a49b778ae7191a1f91c07bd51e99138db7a361c38a99feadd13b18","target":"record","created_at":"2026-05-18T02:12:10Z","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":"61336b81a82e8a8f4df0ab89eb824d01f78a06b3acdea876671b50034e97cb5b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-05-12T20:00:19Z","title_canon_sha256":"39cd455fb2a4734b5cf4b2eb1a3b298d699df1c951820c441c583c17d285a135"},"schema_version":"1.0","source":{"id":"1505.03143","kind":"arxiv","version":1}},"canonical_sha256":"568393e966f0edb6790569818f9fba28aba2346ee8a9d0ccea1dd30dd0777982","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"568393e966f0edb6790569818f9fba28aba2346ee8a9d0ccea1dd30dd0777982","first_computed_at":"2026-05-18T02:12:10.415333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:10.415333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f67IaHriQi6PwUMDBMJN0mL+rMo3jSYD0pYkCYePCHwNEHojCsW2STx257suewWJThggNBhaMZ5jyrEfIS3MBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:10.415938Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03143","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ee6f61a25a49b778ae7191a1f91c07bd51e99138db7a361c38a99feadd13b18","sha256:4200c0cabb7319e746aaa0db06b00d7e738a7c1f1b27f8bb35d88a70963be20f"],"state_sha256":"da7271fadad6eb41ed0f3164b2d078114f9fc8694543074a81644e14d905cad0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lzdR/3vIUf5UEwb8CplOPp1xcePLeU6C4O6l8Lgefj3NPajlmHNgSpNRidO7BV1Klf9nWROhE4YpjSwBHTZrDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:23:04.552154Z","bundle_sha256":"a84de4e412c9f22cd0656a44f8e34f8e4ad0fd9255c08833802e0669083a143a"}}