{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:AQRN327PMDSIRZVH25PZCFWOJ5","short_pith_number":"pith:AQRN327P","canonical_record":{"source":{"id":"2602.20253","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-02-23T19:00:03Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"283d79412e8bfec1b0905760e8498693559ead2b0dffe792805da8b1be453cd8","abstract_canon_sha256":"4bb9fe0775255d35b545e870b9048c6dd61e6122b04ec0d5a94413800856f2ac"},"schema_version":"1.0"},"canonical_sha256":"0422ddebef60e488e6a7d75f9116ce4f7f1405600118983bce8b79e52fb4ae6e","source":{"kind":"arxiv","id":"2602.20253","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.20253","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"arxiv_version","alias_value":"2602.20253v1","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.20253","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_12","alias_value":"AQRN327PMDSI","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_16","alias_value":"AQRN327PMDSIRZVH","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_8","alias_value":"AQRN327P","created_at":"2026-07-08T01:18:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:AQRN327PMDSIRZVH25PZCFWOJ5","target":"record","payload":{"canonical_record":{"source":{"id":"2602.20253","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-02-23T19:00:03Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"283d79412e8bfec1b0905760e8498693559ead2b0dffe792805da8b1be453cd8","abstract_canon_sha256":"4bb9fe0775255d35b545e870b9048c6dd61e6122b04ec0d5a94413800856f2ac"},"schema_version":"1.0"},"canonical_sha256":"0422ddebef60e488e6a7d75f9116ce4f7f1405600118983bce8b79e52fb4ae6e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-08T01:18:25.998456Z","signature_b64":"aMQxk3RgnzaHNYRYgoie867UGOm5e8G2PvDgPtMGXq8UIJgIiKuvcByjSZH15Q+LBi2GCPMIYmcOKsi4lk+VAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0422ddebef60e488e6a7d75f9116ce4f7f1405600118983bce8b79e52fb4ae6e","last_reissued_at":"2026-07-08T01:18:25.997875Z","signature_status":"signed_v1","first_computed_at":"2026-07-08T01:18:25.997875Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.20253","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":"2026-07-08T01:18:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3f1Idn3k+mJ5AMY7CazfDF6Ay9fmc1fgjVOLZZWwPz8iWofUOAlefym0Ec72yacx7X2qCIr612cZWVYUtF4/DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:53:08.515542Z"},"content_sha256":"a9e0bee2a8cf821e8af5ce716b4bbc088616b5e4f091d33f382d1e962bcc124d","schema_version":"1.0","event_id":"sha256:a9e0bee2a8cf821e8af5ce716b4bbc088616b5e4f091d33f382d1e962bcc124d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:AQRN327PMDSIRZVH25PZCFWOJ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spontaneous particle creation by oscillating compact stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Adri\\'an del R\\'io, Pau L\\'opez-Oliver","submitted_at":"2026-02-23T19:00:03Z","abstract_excerpt":"Quantum field theory predicts that dynamical curved spacetimes can spontaneously excite particle pairs from the quantum vacuum, a phenomenon extensively studied in expanding universes and in scenarios involving gravitational collapse. In this article, we explore particle creation driven by radial oscillations of 3+1-dimensional spherically symmetric compact objects, such as neutron stars, using a massless, minimally coupled scalar field as a reference model. We employ a toy model to describe the oscillatory dynamics and its coupling to the field modes, focusing on the resulting effects in the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.20253","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/2602.20253/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":"2026-07-08T01:18:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VOZD73UGOIwLRhkyj8nyRstbWGO0GQzX+C5CO4rRCTxy3FyNw2RUQZQzM4rTg7TSyY4aefQ7MMOafKBek9NpAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:53:08.516398Z"},"content_sha256":"6146e0dfd44d3a7394c18feee65e603ebf33d6b7566ad81bf482a8d9a797ed9e","schema_version":"1.0","event_id":"sha256:6146e0dfd44d3a7394c18feee65e603ebf33d6b7566ad81bf482a8d9a797ed9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AQRN327PMDSIRZVH25PZCFWOJ5/bundle.json","state_url":"https://pith.science/pith/AQRN327PMDSIRZVH25PZCFWOJ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AQRN327PMDSIRZVH25PZCFWOJ5/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":"2026-08-04T21:53:08Z","links":{"resolver":"https://pith.science/pith/AQRN327PMDSIRZVH25PZCFWOJ5","bundle":"https://pith.science/pith/AQRN327PMDSIRZVH25PZCFWOJ5/bundle.json","state":"https://pith.science/pith/AQRN327PMDSIRZVH25PZCFWOJ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AQRN327PMDSIRZVH25PZCFWOJ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AQRN327PMDSIRZVH25PZCFWOJ5","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":"4bb9fe0775255d35b545e870b9048c6dd61e6122b04ec0d5a94413800856f2ac","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-02-23T19:00:03Z","title_canon_sha256":"283d79412e8bfec1b0905760e8498693559ead2b0dffe792805da8b1be453cd8"},"schema_version":"1.0","source":{"id":"2602.20253","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.20253","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"arxiv_version","alias_value":"2602.20253v1","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.20253","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_12","alias_value":"AQRN327PMDSI","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_16","alias_value":"AQRN327PMDSIRZVH","created_at":"2026-07-08T01:18:25Z"},{"alias_kind":"pith_short_8","alias_value":"AQRN327P","created_at":"2026-07-08T01:18:25Z"}],"graph_snapshots":[{"event_id":"sha256:6146e0dfd44d3a7394c18feee65e603ebf33d6b7566ad81bf482a8d9a797ed9e","target":"graph","created_at":"2026-07-08T01:18:25Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2602.20253/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum field theory predicts that dynamical curved spacetimes can spontaneously excite particle pairs from the quantum vacuum, a phenomenon extensively studied in expanding universes and in scenarios involving gravitational collapse. In this article, we explore particle creation driven by radial oscillations of 3+1-dimensional spherically symmetric compact objects, such as neutron stars, using a massless, minimally coupled scalar field as a reference model. We employ a toy model to describe the oscillatory dynamics and its coupling to the field modes, focusing on the resulting effects in the ","authors_text":"Adri\\'an del R\\'io, Pau L\\'opez-Oliver","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-02-23T19:00:03Z","title":"Spontaneous particle creation by oscillating compact stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.20253","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:a9e0bee2a8cf821e8af5ce716b4bbc088616b5e4f091d33f382d1e962bcc124d","target":"record","created_at":"2026-07-08T01:18:25Z","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":"4bb9fe0775255d35b545e870b9048c6dd61e6122b04ec0d5a94413800856f2ac","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-02-23T19:00:03Z","title_canon_sha256":"283d79412e8bfec1b0905760e8498693559ead2b0dffe792805da8b1be453cd8"},"schema_version":"1.0","source":{"id":"2602.20253","kind":"arxiv","version":1}},"canonical_sha256":"0422ddebef60e488e6a7d75f9116ce4f7f1405600118983bce8b79e52fb4ae6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0422ddebef60e488e6a7d75f9116ce4f7f1405600118983bce8b79e52fb4ae6e","first_computed_at":"2026-07-08T01:18:25.997875Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-08T01:18:25.997875Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aMQxk3RgnzaHNYRYgoie867UGOm5e8G2PvDgPtMGXq8UIJgIiKuvcByjSZH15Q+LBi2GCPMIYmcOKsi4lk+VAA==","signature_status":"signed_v1","signed_at":"2026-07-08T01:18:25.998456Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.20253","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9e0bee2a8cf821e8af5ce716b4bbc088616b5e4f091d33f382d1e962bcc124d","sha256:6146e0dfd44d3a7394c18feee65e603ebf33d6b7566ad81bf482a8d9a797ed9e"],"state_sha256":"c116f944b46647e3aac0a1e6afb522e1fa7718fcac524b97fbfb77fe08e0eb72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4AhRYLGCPw4mOeaMipqhOY50DXFgg2MLOO7g4jJTz3+EQ8F9vXc7bOB0rh6KGSZQzOI9d9/OcCxCoYpq9VDZAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T21:53:08.524622Z","bundle_sha256":"48820e3a4740d7db54b5896d81e4082a4e6cabe63ebcecb4f7b0d87525e1afe5"}}