{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:RKWP7Y7JGMWXLAQCB3FTI3QSYZ","short_pith_number":"pith:RKWP7Y7J","canonical_record":{"source":{"id":"astro-ph/0610850","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-27T21:52:01Z","cross_cats_sorted":[],"title_canon_sha256":"8cd6fe0d284b2a8e678c6c79b6f408db21e4a607b9b9c9fc53476d1ec6160f6a","abstract_canon_sha256":"72e803f10166087970b9065c274589d14aaa59bd9ddb5a0bb42665a3eee1877e"},"schema_version":"1.0"},"canonical_sha256":"8aacffe3e9332d7582020ecb346e12c66fd5a61b6d644d222b1d1f1edddb06da","source":{"kind":"arxiv","id":"astro-ph/0610850","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0610850","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0610850v1","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0610850","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"RKWP7Y7JGMWX","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"RKWP7Y7JGMWXLAQC","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"RKWP7Y7J","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:RKWP7Y7JGMWXLAQCB3FTI3QSYZ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0610850","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-27T21:52:01Z","cross_cats_sorted":[],"title_canon_sha256":"8cd6fe0d284b2a8e678c6c79b6f408db21e4a607b9b9c9fc53476d1ec6160f6a","abstract_canon_sha256":"72e803f10166087970b9065c274589d14aaa59bd9ddb5a0bb42665a3eee1877e"},"schema_version":"1.0"},"canonical_sha256":"8aacffe3e9332d7582020ecb346e12c66fd5a61b6d644d222b1d1f1edddb06da","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:29.097939Z","signature_b64":"9Qs8QNQrWUszhbEZ7yB7Ummze3Yptll+CSRuxqsr8W7XsVTjpQmdgM2BhITtSzyKqbT/V5IARpwM7cswG8I0BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8aacffe3e9332d7582020ecb346e12c66fd5a61b6d644d222b1d1f1edddb06da","last_reissued_at":"2026-05-18T01:40:29.097420Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:29.097420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0610850","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":"2026-05-18T01:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s1nA5YwWECoBcb+KGf9OzQA2SZ3EYGePfyEDmpegP2HCeWe8X/8XynU84qcSzUqvnRax5oIgsIpJnfR+Y/1pAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:21:41.359189Z"},"content_sha256":"90f89695fc5158c37006676b08a44024449575baef28cb3a1ee9660470624191","schema_version":"1.0","event_id":"sha256:90f89695fc5158c37006676b08a44024449575baef28cb3a1ee9660470624191"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:RKWP7Y7JGMWXLAQCB3FTI3QSYZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beyond the Cool Core: The Formation of Cool Core Galaxy Clusters","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Louisiana State University, (3) University of California-San Diego), Boulder, Brennan Gantner (1), Eric J. Hallman (1), Jack O. Burns (1), Michael L. Norman (3)((1) University of Colorado, Patrick M. Motl (2)","submitted_at":"2006-10-27T21:52:01Z","abstract_excerpt":"Why do some clusters have cool cores while others do not? In this paper, cosmological simulations, including radiative cooling and heating, are used to examine the formation and evolution of cool core (CC) and non-cool core (NCC) clusters. Numerical CC clusters at z=0 accreted mass more slowly over time and grew enhanced cool cores via hierarchical mergers; when late major mergers occurred, the CCs survived the collisions. By contrast, NCC clusters of similar mass experienced major mergers early in their evolution that destroyed embryonic cool cores and produced conditions that prevent CC re-f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0610850","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":"2026-05-18T01:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zA02N/65M7ozridPCP2DuYPApBysAazIln9N0F14OhZn4RFi2u2QcskcUHs3KPZd+046vFwXU3eKo8AmljSkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:21:41.359825Z"},"content_sha256":"e67c0edcd3e11225df493ac01bee6742ea64577a6b12eb06901ed9df60a017d3","schema_version":"1.0","event_id":"sha256:e67c0edcd3e11225df493ac01bee6742ea64577a6b12eb06901ed9df60a017d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/bundle.json","state_url":"https://pith.science/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/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":"2026-05-26T02:21:41Z","links":{"resolver":"https://pith.science/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ","bundle":"https://pith.science/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/bundle.json","state":"https://pith.science/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RKWP7Y7JGMWXLAQCB3FTI3QSYZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:RKWP7Y7JGMWXLAQCB3FTI3QSYZ","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":"72e803f10166087970b9065c274589d14aaa59bd9ddb5a0bb42665a3eee1877e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-27T21:52:01Z","title_canon_sha256":"8cd6fe0d284b2a8e678c6c79b6f408db21e4a607b9b9c9fc53476d1ec6160f6a"},"schema_version":"1.0","source":{"id":"astro-ph/0610850","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0610850","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0610850v1","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0610850","created_at":"2026-05-18T01:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"RKWP7Y7JGMWX","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"RKWP7Y7JGMWXLAQC","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"RKWP7Y7J","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:e67c0edcd3e11225df493ac01bee6742ea64577a6b12eb06901ed9df60a017d3","target":"graph","created_at":"2026-05-18T01:40:29Z","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":"Why do some clusters have cool cores while others do not? In this paper, cosmological simulations, including radiative cooling and heating, are used to examine the formation and evolution of cool core (CC) and non-cool core (NCC) clusters. Numerical CC clusters at z=0 accreted mass more slowly over time and grew enhanced cool cores via hierarchical mergers; when late major mergers occurred, the CCs survived the collisions. By contrast, NCC clusters of similar mass experienced major mergers early in their evolution that destroyed embryonic cool cores and produced conditions that prevent CC re-f","authors_text":"(2) Louisiana State University, (3) University of California-San Diego), Boulder, Brennan Gantner (1), Eric J. Hallman (1), Jack O. Burns (1), Michael L. Norman (3)((1) University of Colorado, Patrick M. Motl (2)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-10-27T21:52:01Z","title":"Beyond the Cool Core: The Formation of Cool Core Galaxy Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0610850","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":"sha256:90f89695fc5158c37006676b08a44024449575baef28cb3a1ee9660470624191","target":"record","created_at":"2026-05-18T01:40:29Z","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":"72e803f10166087970b9065c274589d14aaa59bd9ddb5a0bb42665a3eee1877e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-10-27T21:52:01Z","title_canon_sha256":"8cd6fe0d284b2a8e678c6c79b6f408db21e4a607b9b9c9fc53476d1ec6160f6a"},"schema_version":"1.0","source":{"id":"astro-ph/0610850","kind":"arxiv","version":1}},"canonical_sha256":"8aacffe3e9332d7582020ecb346e12c66fd5a61b6d644d222b1d1f1edddb06da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8aacffe3e9332d7582020ecb346e12c66fd5a61b6d644d222b1d1f1edddb06da","first_computed_at":"2026-05-18T01:40:29.097420Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:29.097420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9Qs8QNQrWUszhbEZ7yB7Ummze3Yptll+CSRuxqsr8W7XsVTjpQmdgM2BhITtSzyKqbT/V5IARpwM7cswG8I0BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:29.097939Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0610850","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90f89695fc5158c37006676b08a44024449575baef28cb3a1ee9660470624191","sha256:e67c0edcd3e11225df493ac01bee6742ea64577a6b12eb06901ed9df60a017d3"],"state_sha256":"ae677dc38260ebf3179499971bf2b6795d5d4e6cd7e9e5e325b0348ecca348e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"llOawsRaDWT9bVtMvuSMcyTV6desLD+ndv9ESOm3zmZG5JRe+tybg6I/oNDz/ERjpoEUHDvGRsj3loCBqtBCAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:21:41.362442Z","bundle_sha256":"5dbcabc475bb1fb9820411a952ce2e5b392baf39aed47a478bad861be4d41067"}}