{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:STGCAVEBEWK6NDCCKBGDME65JY","short_pith_number":"pith:STGCAVEB","canonical_record":{"source":{"id":"0912.1799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-09T16:52:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"61a07cbc5427907cfda8760a5ff2d402a5ff0966c92cb11b8f59721039442aa3","abstract_canon_sha256":"3dba02c4b551693bc9b445546c211a2e1db663347291a2b2aee532e64c067892"},"schema_version":"1.0"},"canonical_sha256":"94cc2054812595e68c42504c3613dd4e00edcbc742f30b7671f8c3aa08da8b72","source":{"kind":"arxiv","id":"0912.1799","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.1799","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"0912.1799v1","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1799","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"STGCAVEBEWK6","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"STGCAVEBEWK6NDCC","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"STGCAVEB","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:STGCAVEBEWK6NDCCKBGDME65JY","target":"record","payload":{"canonical_record":{"source":{"id":"0912.1799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-09T16:52:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"61a07cbc5427907cfda8760a5ff2d402a5ff0966c92cb11b8f59721039442aa3","abstract_canon_sha256":"3dba02c4b551693bc9b445546c211a2e1db663347291a2b2aee532e64c067892"},"schema_version":"1.0"},"canonical_sha256":"94cc2054812595e68c42504c3613dd4e00edcbc742f30b7671f8c3aa08da8b72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:25.172084Z","signature_b64":"jmDQAFJB0sYTOAtbLUIuC4WnWdXyRpdnwUkOY7z4Q7b3aHblgv2EdpoO7UtfC1D/g7fay43SyuviSsBHOudhDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94cc2054812595e68c42504c3613dd4e00edcbc742f30b7671f8c3aa08da8b72","last_reissued_at":"2026-05-18T02:10:25.171354Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:25.171354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.1799","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":"2026-05-18T02:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fyvhzMZhP1KUF4JM9nK8udRgNd74LOszcbv8MZ8x4JI2N/C88xSBDmF35KbGXPADPogeV1nOSoYToPUJHikoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T06:24:51.234937Z"},"content_sha256":"c4cf1082d21382490714d4dd837b90a07583e9930c5cf29de1179b8a581a58cb","schema_version":"1.0","event_id":"sha256:c4cf1082d21382490714d4dd837b90a07583e9930c5cf29de1179b8a581a58cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:STGCAVEBEWK6NDCCKBGDME65JY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-ray emitting MHD accretion shocks in classical T Tauri stars. Case for moderate to high plasma-beta values","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Maggio, C. Argiroffi, F. Reale, G.G. Sacco, G. Peres, S. Orlando","submitted_at":"2009-12-09T16:52:08Z","abstract_excerpt":"AIMS. We investigate the stability and dynamics of accretion shocks in CTTSs, considering the case of beta >= 1 in the post-shock region. In these cases the 1D approximation is not valid and a multi-dimensional MHD approach is necessary.\n  METHODS. We model an accretion stream propagating through the atmosphere of a CTTS and impacting onto its chromosphere, by performing 2D axisymmetric MHD simulations. The model takes into account the stellar magnetic field, the gravity, the radiative cooling, and the thermal conduction (including the effects of heat flux saturation).\n  RESULTS. The dynamics "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1799","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":"2026-05-18T02:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o8mHt8UVp3d8Ge3jzL8i8ztWM/m3T/KiTkFwA9LPpnBwtEMsOLYeYoYeiIyn3LVLu93vjJ+ucgylyYggVVAHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T06:24:51.235679Z"},"content_sha256":"07696d98c269f86883559b563b5783807339f9fef07f9557d884aa2f4958eb04","schema_version":"1.0","event_id":"sha256:07696d98c269f86883559b563b5783807339f9fef07f9557d884aa2f4958eb04"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/STGCAVEBEWK6NDCCKBGDME65JY/bundle.json","state_url":"https://pith.science/pith/STGCAVEBEWK6NDCCKBGDME65JY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/STGCAVEBEWK6NDCCKBGDME65JY/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":"2026-06-08T06:24:51Z","links":{"resolver":"https://pith.science/pith/STGCAVEBEWK6NDCCKBGDME65JY","bundle":"https://pith.science/pith/STGCAVEBEWK6NDCCKBGDME65JY/bundle.json","state":"https://pith.science/pith/STGCAVEBEWK6NDCCKBGDME65JY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/STGCAVEBEWK6NDCCKBGDME65JY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:STGCAVEBEWK6NDCCKBGDME65JY","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":"3dba02c4b551693bc9b445546c211a2e1db663347291a2b2aee532e64c067892","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-09T16:52:08Z","title_canon_sha256":"61a07cbc5427907cfda8760a5ff2d402a5ff0966c92cb11b8f59721039442aa3"},"schema_version":"1.0","source":{"id":"0912.1799","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.1799","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"0912.1799v1","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1799","created_at":"2026-05-18T02:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"STGCAVEBEWK6","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"STGCAVEBEWK6NDCC","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"STGCAVEB","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:07696d98c269f86883559b563b5783807339f9fef07f9557d884aa2f4958eb04","target":"graph","created_at":"2026-05-18T02:10:25Z","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":"AIMS. We investigate the stability and dynamics of accretion shocks in CTTSs, considering the case of beta >= 1 in the post-shock region. In these cases the 1D approximation is not valid and a multi-dimensional MHD approach is necessary.\n  METHODS. We model an accretion stream propagating through the atmosphere of a CTTS and impacting onto its chromosphere, by performing 2D axisymmetric MHD simulations. The model takes into account the stellar magnetic field, the gravity, the radiative cooling, and the thermal conduction (including the effects of heat flux saturation).\n  RESULTS. The dynamics ","authors_text":"A. Maggio, C. Argiroffi, F. Reale, G.G. Sacco, G. Peres, S. Orlando","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-09T16:52:08Z","title":"X-ray emitting MHD accretion shocks in classical T Tauri stars. Case for moderate to high plasma-beta values"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1799","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:c4cf1082d21382490714d4dd837b90a07583e9930c5cf29de1179b8a581a58cb","target":"record","created_at":"2026-05-18T02:10:25Z","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":"3dba02c4b551693bc9b445546c211a2e1db663347291a2b2aee532e64c067892","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-12-09T16:52:08Z","title_canon_sha256":"61a07cbc5427907cfda8760a5ff2d402a5ff0966c92cb11b8f59721039442aa3"},"schema_version":"1.0","source":{"id":"0912.1799","kind":"arxiv","version":1}},"canonical_sha256":"94cc2054812595e68c42504c3613dd4e00edcbc742f30b7671f8c3aa08da8b72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94cc2054812595e68c42504c3613dd4e00edcbc742f30b7671f8c3aa08da8b72","first_computed_at":"2026-05-18T02:10:25.171354Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:25.171354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jmDQAFJB0sYTOAtbLUIuC4WnWdXyRpdnwUkOY7z4Q7b3aHblgv2EdpoO7UtfC1D/g7fay43SyuviSsBHOudhDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:25.172084Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.1799","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4cf1082d21382490714d4dd837b90a07583e9930c5cf29de1179b8a581a58cb","sha256:07696d98c269f86883559b563b5783807339f9fef07f9557d884aa2f4958eb04"],"state_sha256":"d773a1b4155373ff58de3540086b7a4ebbb9fe7fd3e11a6d953f546cf440cdff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vAFaEAq94iU710iJg4XQQNYefZHgPDUIVrXgrRzVP3JHMOcxq91gOBjZiXBay9PFPlSVmsL3DO1av6Rpu38XDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T06:24:51.239925Z","bundle_sha256":"ff16a2d85a6e8146ce635b74bb48b1fdfd8a2958e9c50c09b4cbcd9863da5abd"}}