{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:BRDFKQQCQIX7HQ4RZ4QDJZNWPL","short_pith_number":"pith:BRDFKQQC","canonical_record":{"source":{"id":"astro-ph/0105123","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-05-08T09:47:08Z","cross_cats_sorted":[],"title_canon_sha256":"226e776535469de8ef830f33f3c9c8bfacdb1ffef2f9150c0adcdc47ea30fe52","abstract_canon_sha256":"aa17442568832a9141f7944ffe320e84f41bd8112ce221cd4bc02a768042b9b4"},"schema_version":"1.0"},"canonical_sha256":"0c46554202822ff3c391cf2034e5b67aeca0cdc1ab73ea1cd27c396bcd0188c9","source":{"kind":"arxiv","id":"astro-ph/0105123","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0105123","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0105123v2","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0105123","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_12","alias_value":"BRDFKQQCQIX7","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_16","alias_value":"BRDFKQQCQIX7HQ4R","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_8","alias_value":"BRDFKQQC","created_at":"2026-07-04T16:23:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:BRDFKQQCQIX7HQ4RZ4QDJZNWPL","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0105123","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-05-08T09:47:08Z","cross_cats_sorted":[],"title_canon_sha256":"226e776535469de8ef830f33f3c9c8bfacdb1ffef2f9150c0adcdc47ea30fe52","abstract_canon_sha256":"aa17442568832a9141f7944ffe320e84f41bd8112ce221cd4bc02a768042b9b4"},"schema_version":"1.0"},"canonical_sha256":"0c46554202822ff3c391cf2034e5b67aeca0cdc1ab73ea1cd27c396bcd0188c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:23:21.505498Z","signature_b64":"HOITVtwiVhocjK1h0DMoADa4bv2oDboUn8U63Wjx9LyUuFVch6J8wL7qYgBfGAqoIk5uw6lloUWZHTcap6UCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c46554202822ff3c391cf2034e5b67aeca0cdc1ab73ea1cd27c396bcd0188c9","last_reissued_at":"2026-07-04T16:23:21.504908Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:23:21.504908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0105123","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":"2026-07-04T16:23:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kY2DWL/nZljaNwE+A0DjmuY9MSU7GL0KttqS8Jsmp5dv5swlTyklzfCU2/CxIQn5fffhKENqADpM5yRTgtpCCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:35:21.157043Z"},"content_sha256":"560ed646decf63efaca4c9aca3569679847a5dc35ea03dae3fc2e48611f2af0a","schema_version":"1.0","event_id":"sha256:560ed646decf63efaca4c9aca3569679847a5dc35ea03dae3fc2e48611f2af0a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:BRDFKQQCQIX7HQ4RZ4QDJZNWPL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Testing Tidal-Torque Theory: I. Spin Amplitude and Direction","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Avishai Dekel (HU Jerusalem), Cristiano Porciani (IoA Cambridge, HU Jerusalem), Yehuda Hoffman (HU Jerusalem)","submitted_at":"2001-05-08T09:47:08Z","abstract_excerpt":"We evaluate the success of linear tidal-torque theory (TTT) in predicting galactic-halo spin using a cosmological N-body simulation with thousands of well-resolved haloes. The proto-haloes are identified by tracing today's haloes back to the initial conditions. The TTT predictions for the proto-haloes match, on average, the spin amplitudes of today's virialized haloes if linear growth is assumed until ~t_0/3, or 55-70 per cent of the halo effective turn-around time. This makes it a useful qualitative tool for understanding certain average properties of galaxies, such as total spin and angular-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0105123","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0105123/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:23:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l2zBmnnSzX3JRGiBrOy39N3eIhv3X0RTtVt/fsL8WVGZOR+ALzFrnBWL+/zetjAViSBrYEUZUh6XMFMsGaSoCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:35:21.157717Z"},"content_sha256":"c91ffd3d47a4c97db0b22fd3ef5399833e70e7286082ae00464012446f6a46e7","schema_version":"1.0","event_id":"sha256:c91ffd3d47a4c97db0b22fd3ef5399833e70e7286082ae00464012446f6a46e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/bundle.json","state_url":"https://pith.science/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/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":"2026-08-14T01:35:21Z","links":{"resolver":"https://pith.science/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL","bundle":"https://pith.science/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/bundle.json","state":"https://pith.science/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BRDFKQQCQIX7HQ4RZ4QDJZNWPL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:BRDFKQQCQIX7HQ4RZ4QDJZNWPL","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":"aa17442568832a9141f7944ffe320e84f41bd8112ce221cd4bc02a768042b9b4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-05-08T09:47:08Z","title_canon_sha256":"226e776535469de8ef830f33f3c9c8bfacdb1ffef2f9150c0adcdc47ea30fe52"},"schema_version":"1.0","source":{"id":"astro-ph/0105123","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0105123","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0105123v2","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0105123","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_12","alias_value":"BRDFKQQCQIX7","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_16","alias_value":"BRDFKQQCQIX7HQ4R","created_at":"2026-07-04T16:23:21Z"},{"alias_kind":"pith_short_8","alias_value":"BRDFKQQC","created_at":"2026-07-04T16:23:21Z"}],"graph_snapshots":[{"event_id":"sha256:c91ffd3d47a4c97db0b22fd3ef5399833e70e7286082ae00464012446f6a46e7","target":"graph","created_at":"2026-07-04T16:23:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0105123/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We evaluate the success of linear tidal-torque theory (TTT) in predicting galactic-halo spin using a cosmological N-body simulation with thousands of well-resolved haloes. The proto-haloes are identified by tracing today's haloes back to the initial conditions. The TTT predictions for the proto-haloes match, on average, the spin amplitudes of today's virialized haloes if linear growth is assumed until ~t_0/3, or 55-70 per cent of the halo effective turn-around time. This makes it a useful qualitative tool for understanding certain average properties of galaxies, such as total spin and angular-","authors_text":"Avishai Dekel (HU Jerusalem), Cristiano Porciani (IoA Cambridge, HU Jerusalem), Yehuda Hoffman (HU Jerusalem)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-05-08T09:47:08Z","title":"Testing Tidal-Torque Theory: I. Spin Amplitude and Direction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0105123","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":"sha256:560ed646decf63efaca4c9aca3569679847a5dc35ea03dae3fc2e48611f2af0a","target":"record","created_at":"2026-07-04T16:23:21Z","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":"aa17442568832a9141f7944ffe320e84f41bd8112ce221cd4bc02a768042b9b4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-05-08T09:47:08Z","title_canon_sha256":"226e776535469de8ef830f33f3c9c8bfacdb1ffef2f9150c0adcdc47ea30fe52"},"schema_version":"1.0","source":{"id":"astro-ph/0105123","kind":"arxiv","version":2}},"canonical_sha256":"0c46554202822ff3c391cf2034e5b67aeca0cdc1ab73ea1cd27c396bcd0188c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c46554202822ff3c391cf2034e5b67aeca0cdc1ab73ea1cd27c396bcd0188c9","first_computed_at":"2026-07-04T16:23:21.504908Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:23:21.504908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HOITVtwiVhocjK1h0DMoADa4bv2oDboUn8U63Wjx9LyUuFVch6J8wL7qYgBfGAqoIk5uw6lloUWZHTcap6UCDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:23:21.505498Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0105123","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:560ed646decf63efaca4c9aca3569679847a5dc35ea03dae3fc2e48611f2af0a","sha256:c91ffd3d47a4c97db0b22fd3ef5399833e70e7286082ae00464012446f6a46e7"],"state_sha256":"723e187dfdcd4353c05a69889c2e1b2bf5c1ec10f74ebd89e817f8ed947d8e09"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GV6GlKNhiol/tvx0o+pCXfGFgBE7ZIIq8pFInllX/I75tyBDmeF6uAJepoKakRhspgpzH9XKTyqqZ8nGA4CuBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T01:35:21.161425Z","bundle_sha256":"7874102bb8afb2b49f76062f34a624af81876e0ccf3706460b8d5917ec2dc3ed"}}