{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OS2SWLJVGVDLOUMYFHA3KALX4C","short_pith_number":"pith:OS2SWLJV","canonical_record":{"source":{"id":"1802.05916","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-16T12:54:39Z","cross_cats_sorted":[],"title_canon_sha256":"4fba353df5a1d2bbe634ef54110bc4f62b9f010e5a90e56145a005653c11c3b5","abstract_canon_sha256":"ae6dca7399783bc5842b7609cf9f1e7c6207537b45c56ecda55f6466a4572920"},"schema_version":"1.0"},"canonical_sha256":"74b52b2d353546b7519829c1b50177e089604c4da4a88a1ef5b14a15089c470f","source":{"kind":"arxiv","id":"1802.05916","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05916","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05916v2","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05916","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"pith_short_12","alias_value":"OS2SWLJVGVDL","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OS2SWLJVGVDLOUMY","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OS2SWLJV","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OS2SWLJVGVDLOUMYFHA3KALX4C","target":"record","payload":{"canonical_record":{"source":{"id":"1802.05916","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-16T12:54:39Z","cross_cats_sorted":[],"title_canon_sha256":"4fba353df5a1d2bbe634ef54110bc4f62b9f010e5a90e56145a005653c11c3b5","abstract_canon_sha256":"ae6dca7399783bc5842b7609cf9f1e7c6207537b45c56ecda55f6466a4572920"},"schema_version":"1.0"},"canonical_sha256":"74b52b2d353546b7519829c1b50177e089604c4da4a88a1ef5b14a15089c470f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:30.972289Z","signature_b64":"d1/Q7qrHJFh+/ff2OSuAMkSy8XIvmoh8l0jy0Iedbw+IFX4wkhCLQUCOLGFHZKp6nWxJoh7ZjrQDs7m61QfPDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74b52b2d353546b7519829c1b50177e089604c4da4a88a1ef5b14a15089c470f","last_reissued_at":"2026-05-18T00:18:30.971681Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:30.971681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.05916","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":"2026-05-18T00:18:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9BweofLEC67Upc8mD4ec2qeR43t604CejpTQnClDgTkahBBrbOTKlgmiJfyQWE/p819BY2lMKYS1Pr9cbWncAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:12:32.330049Z"},"content_sha256":"6d9b9ef093f08ba48be2fc90caa8fd15f7af70ad49eac331aaa4c1237fcf0f7c","schema_version":"1.0","event_id":"sha256:6d9b9ef093f08ba48be2fc90caa8fd15f7af70ad49eac331aaa4c1237fcf0f7c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OS2SWLJVGVDLOUMYFHA3KALX4C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Early-type galaxy spin evolution in the Horizon-AGN simulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Christophe Pichon, Hoseung Choi, Julien. E. G. Devriendt, Sukyoung K. Yi, Taysun Kimm, Yohan Dubois","submitted_at":"2018-02-16T12:54:39Z","abstract_excerpt":"Using the Horizon-AGN simulation data, we study the relative role of mergers and environmental effects in shaping the spin of early-type galaxies (ETGs) after $z \\simeq 1$. We follow the spin evolution of 10,037 color-selected ETGs more massive than 10$^{10} \\rm \\, M_{\\odot}$ that are divided into four groups: cluster centrals (3%), cluster satellites (33%), group centrals (5%), and field ETGs (59%). We find a strong mass dependence of the slow rotator fraction, $f_{\\rm SR}$, and the mean spin of massive ETGs. Although we do not find a clear environmental dependence of $f_{\\rm SR}$, a weak tre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05916","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":"2026-05-18T00:18:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RDftW904oKf4sN/AwL4ylYnQa4eWeMY9yWKk35+Z2rqf/ikeBYKEmYbTj7GAOA+BOzyAPpH6U+o4WP93g4AxBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:12:32.330654Z"},"content_sha256":"ba8910c681d40340e5889d2e8d5e28e76ae93d3dd80f53d7acfad2d66ee7f60b","schema_version":"1.0","event_id":"sha256:ba8910c681d40340e5889d2e8d5e28e76ae93d3dd80f53d7acfad2d66ee7f60b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/bundle.json","state_url":"https://pith.science/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/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":"2026-05-28T06:12:32Z","links":{"resolver":"https://pith.science/pith/OS2SWLJVGVDLOUMYFHA3KALX4C","bundle":"https://pith.science/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/bundle.json","state":"https://pith.science/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OS2SWLJVGVDLOUMYFHA3KALX4C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OS2SWLJVGVDLOUMYFHA3KALX4C","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":"ae6dca7399783bc5842b7609cf9f1e7c6207537b45c56ecda55f6466a4572920","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-16T12:54:39Z","title_canon_sha256":"4fba353df5a1d2bbe634ef54110bc4f62b9f010e5a90e56145a005653c11c3b5"},"schema_version":"1.0","source":{"id":"1802.05916","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05916","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05916v2","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05916","created_at":"2026-05-18T00:18:30Z"},{"alias_kind":"pith_short_12","alias_value":"OS2SWLJVGVDL","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OS2SWLJVGVDLOUMY","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OS2SWLJV","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:ba8910c681d40340e5889d2e8d5e28e76ae93d3dd80f53d7acfad2d66ee7f60b","target":"graph","created_at":"2026-05-18T00:18:30Z","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":"Using the Horizon-AGN simulation data, we study the relative role of mergers and environmental effects in shaping the spin of early-type galaxies (ETGs) after $z \\simeq 1$. We follow the spin evolution of 10,037 color-selected ETGs more massive than 10$^{10} \\rm \\, M_{\\odot}$ that are divided into four groups: cluster centrals (3%), cluster satellites (33%), group centrals (5%), and field ETGs (59%). We find a strong mass dependence of the slow rotator fraction, $f_{\\rm SR}$, and the mean spin of massive ETGs. Although we do not find a clear environmental dependence of $f_{\\rm SR}$, a weak tre","authors_text":"Christophe Pichon, Hoseung Choi, Julien. E. G. Devriendt, Sukyoung K. Yi, Taysun Kimm, Yohan Dubois","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-16T12:54:39Z","title":"Early-type galaxy spin evolution in the Horizon-AGN simulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05916","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":"sha256:6d9b9ef093f08ba48be2fc90caa8fd15f7af70ad49eac331aaa4c1237fcf0f7c","target":"record","created_at":"2026-05-18T00:18:30Z","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":"ae6dca7399783bc5842b7609cf9f1e7c6207537b45c56ecda55f6466a4572920","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-16T12:54:39Z","title_canon_sha256":"4fba353df5a1d2bbe634ef54110bc4f62b9f010e5a90e56145a005653c11c3b5"},"schema_version":"1.0","source":{"id":"1802.05916","kind":"arxiv","version":2}},"canonical_sha256":"74b52b2d353546b7519829c1b50177e089604c4da4a88a1ef5b14a15089c470f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74b52b2d353546b7519829c1b50177e089604c4da4a88a1ef5b14a15089c470f","first_computed_at":"2026-05-18T00:18:30.971681Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:30.971681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d1/Q7qrHJFh+/ff2OSuAMkSy8XIvmoh8l0jy0Iedbw+IFX4wkhCLQUCOLGFHZKp6nWxJoh7ZjrQDs7m61QfPDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:30.972289Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.05916","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d9b9ef093f08ba48be2fc90caa8fd15f7af70ad49eac331aaa4c1237fcf0f7c","sha256:ba8910c681d40340e5889d2e8d5e28e76ae93d3dd80f53d7acfad2d66ee7f60b"],"state_sha256":"10520c2f38e04437625954ff31caab41d0257b5eacb034c8ecdebff13a2b25ac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qb0O1zpb1Uq2jIYfDrM3/A7gqZaFmzkBURujvFPIgKNuhwSgE8DPepWGaqe3JQkHgRj89bBqCU/vbQESgG5aDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:12:32.333587Z","bundle_sha256":"cd7894f1a0118e79743737838826081283b939cd6a9f332bb19663973363efa7"}}