{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:C5A4LI2B53U5SRSRNT2R33TTLC","short_pith_number":"pith:C5A4LI2B","canonical_record":{"source":{"id":"1108.5736","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-29T20:00:15Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a25acfc7057c1acb9259a9681f169bab5d31a0dbcd4ec900c0bd6140033d7304","abstract_canon_sha256":"88e46e468ae91fd4612d004582739574c64ca2156f1c730bcc031da7b4b624e0"},"schema_version":"1.0"},"canonical_sha256":"1741c5a341eee9d946516cf51dee7358b19b5510be30419b9257d66d7caf643a","source":{"kind":"arxiv","id":"1108.5736","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.5736","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"arxiv_version","alias_value":"1108.5736v1","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.5736","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"pith_short_12","alias_value":"C5A4LI2B53U5","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"C5A4LI2B53U5SRSR","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"C5A4LI2B","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:C5A4LI2B53U5SRSRNT2R33TTLC","target":"record","payload":{"canonical_record":{"source":{"id":"1108.5736","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-29T20:00:15Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a25acfc7057c1acb9259a9681f169bab5d31a0dbcd4ec900c0bd6140033d7304","abstract_canon_sha256":"88e46e468ae91fd4612d004582739574c64ca2156f1c730bcc031da7b4b624e0"},"schema_version":"1.0"},"canonical_sha256":"1741c5a341eee9d946516cf51dee7358b19b5510be30419b9257d66d7caf643a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:14:36.800328Z","signature_b64":"cLYQvl80VNAgOazWCXZUZPHPcl+/V7vO48nacy8AxC8321p2ko/J0O7tJyhoyGfKpmrQu2NwQll80PAWxNxkDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1741c5a341eee9d946516cf51dee7358b19b5510be30419b9257d66d7caf643a","last_reissued_at":"2026-05-18T04:14:36.799883Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:14:36.799883Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.5736","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":"2026-05-18T04:14:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"81S+e2skwXcI64p/TAlbPOFSXVEHWM/gylWPXENPKRoqSxzCKbOSRs0+18tiuApah1kRxj78CNAgZXj8K8gPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:39:20.238670Z"},"content_sha256":"a9897976b9b6048b946d45009c1f7b1bf71c0e48144d0d997dab93e331a8c9c0","schema_version":"1.0","event_id":"sha256:a9897976b9b6048b946d45009c1f7b1bf71c0e48144d0d997dab93e331a8c9c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:C5A4LI2B53U5SRSRNT2R33TTLC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Halo Contraction Effect in Hydrodynamic Simulations of Galaxy Formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Anatoly A. Klypin, Andrey V. Kravtsov, Daisuke Nagai, Daniel Ceverino, Gustavo Yepes, Nickolay Y. Gnedin, Oleg Y. Gnedin, Robyn Levine","submitted_at":"2011-08-29T20:00:15Z","abstract_excerpt":"The condensation of gas and stars in the inner regions of dark matter halos leads to a more concentrated dark matter distribution. While this effect is based on simple gravitational physics, the question of its validity in hierarchical galaxy formation has led to an active debate in the literature. We use a collection of several state-of-the-art cosmological hydrodynamic simulations to study the halo contraction effect in systems ranging from dwarf galaxies to clusters of galaxies, at high and low redshift. The simulations are run by different groups with different codes and include hierarchic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.5736","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":"2026-05-18T04:14:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CCUT6TUCAEBETF54m+YjelArrinMIsIxxmOjaB5u07UMXR3jA6ZumLo2l9bqf7DAg89p6uHELXT9Syl+3+oIBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:39:20.239366Z"},"content_sha256":"d6178546824cc4f960dc68cc2fb32596204ad821cd09ee63e7241cdecdbbdb20","schema_version":"1.0","event_id":"sha256:d6178546824cc4f960dc68cc2fb32596204ad821cd09ee63e7241cdecdbbdb20"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C5A4LI2B53U5SRSRNT2R33TTLC/bundle.json","state_url":"https://pith.science/pith/C5A4LI2B53U5SRSRNT2R33TTLC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C5A4LI2B53U5SRSRNT2R33TTLC/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":"2026-06-06T15:39:20Z","links":{"resolver":"https://pith.science/pith/C5A4LI2B53U5SRSRNT2R33TTLC","bundle":"https://pith.science/pith/C5A4LI2B53U5SRSRNT2R33TTLC/bundle.json","state":"https://pith.science/pith/C5A4LI2B53U5SRSRNT2R33TTLC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C5A4LI2B53U5SRSRNT2R33TTLC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:C5A4LI2B53U5SRSRNT2R33TTLC","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":"88e46e468ae91fd4612d004582739574c64ca2156f1c730bcc031da7b4b624e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-29T20:00:15Z","title_canon_sha256":"a25acfc7057c1acb9259a9681f169bab5d31a0dbcd4ec900c0bd6140033d7304"},"schema_version":"1.0","source":{"id":"1108.5736","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.5736","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"arxiv_version","alias_value":"1108.5736v1","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.5736","created_at":"2026-05-18T04:14:36Z"},{"alias_kind":"pith_short_12","alias_value":"C5A4LI2B53U5","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"C5A4LI2B53U5SRSR","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"C5A4LI2B","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:d6178546824cc4f960dc68cc2fb32596204ad821cd09ee63e7241cdecdbbdb20","target":"graph","created_at":"2026-05-18T04:14:36Z","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 condensation of gas and stars in the inner regions of dark matter halos leads to a more concentrated dark matter distribution. While this effect is based on simple gravitational physics, the question of its validity in hierarchical galaxy formation has led to an active debate in the literature. We use a collection of several state-of-the-art cosmological hydrodynamic simulations to study the halo contraction effect in systems ranging from dwarf galaxies to clusters of galaxies, at high and low redshift. The simulations are run by different groups with different codes and include hierarchic","authors_text":"Anatoly A. Klypin, Andrey V. Kravtsov, Daisuke Nagai, Daniel Ceverino, Gustavo Yepes, Nickolay Y. Gnedin, Oleg Y. Gnedin, Robyn Levine","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-29T20:00:15Z","title":"Halo Contraction Effect in Hydrodynamic Simulations of Galaxy Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.5736","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:a9897976b9b6048b946d45009c1f7b1bf71c0e48144d0d997dab93e331a8c9c0","target":"record","created_at":"2026-05-18T04:14:36Z","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":"88e46e468ae91fd4612d004582739574c64ca2156f1c730bcc031da7b4b624e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-29T20:00:15Z","title_canon_sha256":"a25acfc7057c1acb9259a9681f169bab5d31a0dbcd4ec900c0bd6140033d7304"},"schema_version":"1.0","source":{"id":"1108.5736","kind":"arxiv","version":1}},"canonical_sha256":"1741c5a341eee9d946516cf51dee7358b19b5510be30419b9257d66d7caf643a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1741c5a341eee9d946516cf51dee7358b19b5510be30419b9257d66d7caf643a","first_computed_at":"2026-05-18T04:14:36.799883Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:14:36.799883Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cLYQvl80VNAgOazWCXZUZPHPcl+/V7vO48nacy8AxC8321p2ko/J0O7tJyhoyGfKpmrQu2NwQll80PAWxNxkDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:14:36.800328Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.5736","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9897976b9b6048b946d45009c1f7b1bf71c0e48144d0d997dab93e331a8c9c0","sha256:d6178546824cc4f960dc68cc2fb32596204ad821cd09ee63e7241cdecdbbdb20"],"state_sha256":"896eb7bbd349878fad66244fa3f16c40ac815ce7c7ce9787ca6323bcc728192d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jBS3HDqvQgHU+bglVSg7e2UOCGtkLVa9C5gr+i+JbqZIF6/Y6irbqS6ImzgzU2j8E6AuqHBbwwAOz35ePZZOAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T15:39:20.243028Z","bundle_sha256":"fbab6a61d105d579a628c00fcd0edac0a685fc9af0a627ae1c853836a1e6d835"}}