{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:54ZQDJO6PTYCT55NQURYIHPPPQ","short_pith_number":"pith:54ZQDJO6","canonical_record":{"source":{"id":"2506.07973","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-06-09T17:48:12Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"fc7980e355bfac54c7c444b1894c471bf597bcbf4a48d0e0af46c54669b4604a","abstract_canon_sha256":"23689f67ce77a59cb41da77d3ba23e0eb72368ab657f9581d3b852102deef5a0"},"schema_version":"1.0"},"canonical_sha256":"ef3301a5de7cf029f7ad8523841def7c302184ed98d6ce9d35b1c3dfc2b4cdbc","source":{"kind":"arxiv","id":"2506.07973","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.07973","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"arxiv_version","alias_value":"2506.07973v1","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.07973","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_12","alias_value":"54ZQDJO6PTYC","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_16","alias_value":"54ZQDJO6PTYCT55N","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_8","alias_value":"54ZQDJO6","created_at":"2026-07-05T11:18:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:54ZQDJO6PTYCT55NQURYIHPPPQ","target":"record","payload":{"canonical_record":{"source":{"id":"2506.07973","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-06-09T17:48:12Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"fc7980e355bfac54c7c444b1894c471bf597bcbf4a48d0e0af46c54669b4604a","abstract_canon_sha256":"23689f67ce77a59cb41da77d3ba23e0eb72368ab657f9581d3b852102deef5a0"},"schema_version":"1.0"},"canonical_sha256":"ef3301a5de7cf029f7ad8523841def7c302184ed98d6ce9d35b1c3dfc2b4cdbc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:18:36.453982Z","signature_b64":"zwOCd1LiUYOHduiud70erxvIV6m6v3Rbd6h89GY84i9WdqxZ0Y4uV1n3STRFzvYkgE4g2hlwRehIU/yWhHHLBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ef3301a5de7cf029f7ad8523841def7c302184ed98d6ce9d35b1c3dfc2b4cdbc","last_reissued_at":"2026-07-05T11:18:36.453477Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:18:36.453477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.07973","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":"2026-07-05T11:18:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ms4ksw6j65NSZekAgw7BAFQUw+jKVvHxvDKu7iz7r5wPRuc0e8kpykbgDbbU6EmCGXR68hN/Ukl3MbrM89hWCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T01:39:58.671499Z"},"content_sha256":"7cb4103d06a3cb9391efdbd591664af69daf1ea8d0f71be7cc764a9d8ab55227","schema_version":"1.0","event_id":"sha256:7cb4103d06a3cb9391efdbd591664af69daf1ea8d0f71be7cc764a9d8ab55227"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:54ZQDJO6PTYCT55NQURYIHPPPQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density jump as a function of the field for parallel relativistic collisionless shocks","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE","astro-ph.SR"],"primary_cat":"physics.plasm-ph","authors_text":"Antoine Bret, Ramesh Narayan","submitted_at":"2025-06-09T17:48:12Z","abstract_excerpt":"Collisionless shocks are frequently analyzed using the magnetohydrodynamic formalism (MHD), even though the required collisionality hypothesis is not fulfilled. In a previous work \\citep{BretJPP2018}, we presented a model of collisionless shock displaying an important departure from the expected MHD behavior, in the case of a strong flow aligned magnetic field. This model was non-relativistic. Here, it is extended to the relativistic regime, considering zero upstream pressure and upstream Lorentz factor $\\gg 1$. The result agrees satisfactorily with Particle-in-Cell simulations and shows a sim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.07973","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.07973/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":"2026-07-05T11:18:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KIl198ZZ10rdtikh+HQx5xLq5BU7CN3AGI515Uwp9Eu92GaOMrdpEYfyuDzQIgHs3Vu+UQ/JeqB1Q6jFf8DBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T01:39:58.672011Z"},"content_sha256":"e8152da16484ccca2c43b8f8cb2d5d884ee15f2f81bf324587fdb3e7edaa0177","schema_version":"1.0","event_id":"sha256:e8152da16484ccca2c43b8f8cb2d5d884ee15f2f81bf324587fdb3e7edaa0177"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/bundle.json","state_url":"https://pith.science/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/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":"2026-08-09T01:39:58Z","links":{"resolver":"https://pith.science/pith/54ZQDJO6PTYCT55NQURYIHPPPQ","bundle":"https://pith.science/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/bundle.json","state":"https://pith.science/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/54ZQDJO6PTYCT55NQURYIHPPPQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:54ZQDJO6PTYCT55NQURYIHPPPQ","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":"23689f67ce77a59cb41da77d3ba23e0eb72368ab657f9581d3b852102deef5a0","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-06-09T17:48:12Z","title_canon_sha256":"fc7980e355bfac54c7c444b1894c471bf597bcbf4a48d0e0af46c54669b4604a"},"schema_version":"1.0","source":{"id":"2506.07973","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.07973","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"arxiv_version","alias_value":"2506.07973v1","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.07973","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_12","alias_value":"54ZQDJO6PTYC","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_16","alias_value":"54ZQDJO6PTYCT55N","created_at":"2026-07-05T11:18:36Z"},{"alias_kind":"pith_short_8","alias_value":"54ZQDJO6","created_at":"2026-07-05T11:18:36Z"}],"graph_snapshots":[{"event_id":"sha256:e8152da16484ccca2c43b8f8cb2d5d884ee15f2f81bf324587fdb3e7edaa0177","target":"graph","created_at":"2026-07-05T11:18:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.07973/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Collisionless shocks are frequently analyzed using the magnetohydrodynamic formalism (MHD), even though the required collisionality hypothesis is not fulfilled. In a previous work \\citep{BretJPP2018}, we presented a model of collisionless shock displaying an important departure from the expected MHD behavior, in the case of a strong flow aligned magnetic field. This model was non-relativistic. Here, it is extended to the relativistic regime, considering zero upstream pressure and upstream Lorentz factor $\\gg 1$. The result agrees satisfactorily with Particle-in-Cell simulations and shows a sim","authors_text":"Antoine Bret, Ramesh Narayan","cross_cats":["astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-06-09T17:48:12Z","title":"Density jump as a function of the field for parallel relativistic collisionless shocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.07973","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":"sha256:7cb4103d06a3cb9391efdbd591664af69daf1ea8d0f71be7cc764a9d8ab55227","target":"record","created_at":"2026-07-05T11:18:36Z","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":"23689f67ce77a59cb41da77d3ba23e0eb72368ab657f9581d3b852102deef5a0","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.plasm-ph","submitted_at":"2025-06-09T17:48:12Z","title_canon_sha256":"fc7980e355bfac54c7c444b1894c471bf597bcbf4a48d0e0af46c54669b4604a"},"schema_version":"1.0","source":{"id":"2506.07973","kind":"arxiv","version":1}},"canonical_sha256":"ef3301a5de7cf029f7ad8523841def7c302184ed98d6ce9d35b1c3dfc2b4cdbc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ef3301a5de7cf029f7ad8523841def7c302184ed98d6ce9d35b1c3dfc2b4cdbc","first_computed_at":"2026-07-05T11:18:36.453477Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:18:36.453477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zwOCd1LiUYOHduiud70erxvIV6m6v3Rbd6h89GY84i9WdqxZ0Y4uV1n3STRFzvYkgE4g2hlwRehIU/yWhHHLBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:18:36.453982Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.07973","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7cb4103d06a3cb9391efdbd591664af69daf1ea8d0f71be7cc764a9d8ab55227","sha256:e8152da16484ccca2c43b8f8cb2d5d884ee15f2f81bf324587fdb3e7edaa0177"],"state_sha256":"657c3a2192d40fa3390385a5155a0749bf8ef5b1007837989e68268bda72a95d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sBvegQL0wTI4tl52atr5lWzMDLex3Rz3nWuSWi/CnyHNrnaIhttHPwg2rHDB7Ffek3qbSM2L2J+IIKVTBYyKDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T01:39:58.676409Z","bundle_sha256":"ea7742c1331fd79d503ded0cb4f599d53c0dea0d2b771f07cea686b3d81e7c3c"}}