{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:7GE4OIPKUQLPUZAPDQZXKVUJTW","short_pith_number":"pith:7GE4OIPK","canonical_record":{"source":{"id":"0909.0270","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-01T22:12:27Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"e7b4c98ed5fd0f5ea6ec19b2234de6726d6cede72554d1a17041b20f0a9a292e","abstract_canon_sha256":"2eed79af6e47f72edf8c129820d37ba999315a465dd3294303e58c41d6271262"},"schema_version":"1.0"},"canonical_sha256":"f989c721eaa416fa640f1c337556899d81d46d5e274b50f81fc681aa1e609df6","source":{"kind":"arxiv","id":"0909.0270","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0270","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0270v1","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0270","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"7GE4OIPKUQLP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7GE4OIPKUQLPUZAP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7GE4OIPK","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:7GE4OIPKUQLPUZAPDQZXKVUJTW","target":"record","payload":{"canonical_record":{"source":{"id":"0909.0270","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-01T22:12:27Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"e7b4c98ed5fd0f5ea6ec19b2234de6726d6cede72554d1a17041b20f0a9a292e","abstract_canon_sha256":"2eed79af6e47f72edf8c129820d37ba999315a465dd3294303e58c41d6271262"},"schema_version":"1.0"},"canonical_sha256":"f989c721eaa416fa640f1c337556899d81d46d5e274b50f81fc681aa1e609df6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:11.928555Z","signature_b64":"9sphIEysRDkGRPiSXzHhGvtXsNpz/J3D3xlNx0bqubxFR9kuDM63MYe/8uNw8QZzGTzwUtjHTvBq0ekIIMEDAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f989c721eaa416fa640f1c337556899d81d46d5e274b50f81fc681aa1e609df6","last_reissued_at":"2026-05-18T02:12:11.928010Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:11.928010Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.0270","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":"2026-05-18T02:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5543WV0pCE/sTdSzn7ePj4Z19B9up3gEBrE41B8e5Z1Lg6SCvTO6yx4IGhIMJJRatJ/bI4p+/33yFmzF7uwAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:46:52.790858Z"},"content_sha256":"33767459ac9692b1db4549d89b7dcaab33f4f41cc4f3bc16222231826c1b1140","schema_version":"1.0","event_id":"sha256:33767459ac9692b1db4549d89b7dcaab33f4f41cc4f3bc16222231826c1b1140"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:7GE4OIPKUQLPUZAPDQZXKVUJTW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Turbulence and Mixing in the Intracluster Medium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"B. D. G. Chandran, E. Quataert, I. J. Parrish, P. Sharma","submitted_at":"2009-09-01T22:12:27Z","abstract_excerpt":"The intracluster medium (ICM) is stably stratified in the hydrodynamic sense with the entropy $s$ increasing outwards. However, thermal conduction along magnetic field lines fundamentally changes the stability of the ICM, leading to the \"heat-flux buoyancy instability\" when $dT/dr>0$ and the \"magnetothermal instability\" when $dT/dr<0$. The ICM is thus buoyantly unstable regardless of the signs of $dT/dr$ and $ds/dr$. On the other hand, these temperature-gradient-driven instabilities saturate by reorienting the magnetic field (perpendicular to $\\hat{\\bf r}$ when $dT/dr>0$ and parallel to $\\hat{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0270","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":"2026-05-18T02:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xyKKmeveIR96eSpzL0HJkfx5RWq1X+xpqs62R2yxrx8xUmtnQjJf/enWRorVsGIGwjLoGVStU/9LH+EWlVJ2AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:46:52.791218Z"},"content_sha256":"b4abb071b61a28ce34af0e0a51bd130aaa744e5ba5443f77ae02d3d50b48b2ea","schema_version":"1.0","event_id":"sha256:b4abb071b61a28ce34af0e0a51bd130aaa744e5ba5443f77ae02d3d50b48b2ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/bundle.json","state_url":"https://pith.science/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/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":"2026-05-25T09:46:52Z","links":{"resolver":"https://pith.science/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW","bundle":"https://pith.science/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/bundle.json","state":"https://pith.science/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7GE4OIPKUQLPUZAPDQZXKVUJTW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:7GE4OIPKUQLPUZAPDQZXKVUJTW","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":"2eed79af6e47f72edf8c129820d37ba999315a465dd3294303e58c41d6271262","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-01T22:12:27Z","title_canon_sha256":"e7b4c98ed5fd0f5ea6ec19b2234de6726d6cede72554d1a17041b20f0a9a292e"},"schema_version":"1.0","source":{"id":"0909.0270","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0270","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0270v1","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0270","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"7GE4OIPKUQLP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7GE4OIPKUQLPUZAP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7GE4OIPK","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:b4abb071b61a28ce34af0e0a51bd130aaa744e5ba5443f77ae02d3d50b48b2ea","target":"graph","created_at":"2026-05-18T02:12:11Z","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 intracluster medium (ICM) is stably stratified in the hydrodynamic sense with the entropy $s$ increasing outwards. However, thermal conduction along magnetic field lines fundamentally changes the stability of the ICM, leading to the \"heat-flux buoyancy instability\" when $dT/dr>0$ and the \"magnetothermal instability\" when $dT/dr<0$. The ICM is thus buoyantly unstable regardless of the signs of $dT/dr$ and $ds/dr$. On the other hand, these temperature-gradient-driven instabilities saturate by reorienting the magnetic field (perpendicular to $\\hat{\\bf r}$ when $dT/dr>0$ and parallel to $\\hat{","authors_text":"B. D. G. Chandran, E. Quataert, I. J. Parrish, P. Sharma","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-01T22:12:27Z","title":"Turbulence and Mixing in the Intracluster Medium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0270","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":"sha256:33767459ac9692b1db4549d89b7dcaab33f4f41cc4f3bc16222231826c1b1140","target":"record","created_at":"2026-05-18T02:12:11Z","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":"2eed79af6e47f72edf8c129820d37ba999315a465dd3294303e58c41d6271262","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-01T22:12:27Z","title_canon_sha256":"e7b4c98ed5fd0f5ea6ec19b2234de6726d6cede72554d1a17041b20f0a9a292e"},"schema_version":"1.0","source":{"id":"0909.0270","kind":"arxiv","version":1}},"canonical_sha256":"f989c721eaa416fa640f1c337556899d81d46d5e274b50f81fc681aa1e609df6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f989c721eaa416fa640f1c337556899d81d46d5e274b50f81fc681aa1e609df6","first_computed_at":"2026-05-18T02:12:11.928010Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:11.928010Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9sphIEysRDkGRPiSXzHhGvtXsNpz/J3D3xlNx0bqubxFR9kuDM63MYe/8uNw8QZzGTzwUtjHTvBq0ekIIMEDAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:11.928555Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.0270","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33767459ac9692b1db4549d89b7dcaab33f4f41cc4f3bc16222231826c1b1140","sha256:b4abb071b61a28ce34af0e0a51bd130aaa744e5ba5443f77ae02d3d50b48b2ea"],"state_sha256":"73d776a8541a8683bceafe14ca2be9b1e1b93281739a5a5148b2f278a1af1715"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UfPU4wQwL9QiUfQboTxwFZqkajTYG1Kdi/tyJHjIBSUN3dex2u6RShKLnFT1lPOnwtN950UoFpUEIzLMB91WBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T09:46:52.793548Z","bundle_sha256":"a4e7d0798ab4a2c72d12580580e0a3772173353809fd6ecaee7fa4ae1798c479"}}