{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:4FNLQG7UJMA64DNXN24MJV4X2S","short_pith_number":"pith:4FNLQG7U","canonical_record":{"source":{"id":"2504.20272","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-04-28T21:31:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"fa565ad378d731d881aeb00aec65c176058450d109304cf3b927833567de3c2a","abstract_canon_sha256":"aa7ef13c207f6376fcd9f7d0e6a215f39feab2c6bdb44465c052fd0567f29af1"},"schema_version":"1.0"},"canonical_sha256":"e15ab81bf44b01ee0db76eb8c4d797d4aceb544dd5b1629cf543f6bc423e4317","source":{"kind":"arxiv","id":"2504.20272","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20272","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20272v1","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20272","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_12","alias_value":"4FNLQG7UJMA6","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_16","alias_value":"4FNLQG7UJMA64DNX","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_8","alias_value":"4FNLQG7U","created_at":"2026-07-05T10:55:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:4FNLQG7UJMA64DNXN24MJV4X2S","target":"record","payload":{"canonical_record":{"source":{"id":"2504.20272","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-04-28T21:31:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"fa565ad378d731d881aeb00aec65c176058450d109304cf3b927833567de3c2a","abstract_canon_sha256":"aa7ef13c207f6376fcd9f7d0e6a215f39feab2c6bdb44465c052fd0567f29af1"},"schema_version":"1.0"},"canonical_sha256":"e15ab81bf44b01ee0db76eb8c4d797d4aceb544dd5b1629cf543f6bc423e4317","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:55:39.823699Z","signature_b64":"tpO4q/kgyw0S0EfUGfCuCTxl8GmptCJTZ89KUqytrnBQfeF35LSafxHlCpPZGj6fl7AkMyxTgxo0lCSHFFGtBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e15ab81bf44b01ee0db76eb8c4d797d4aceb544dd5b1629cf543f6bc423e4317","last_reissued_at":"2026-07-05T10:55:39.823203Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:55:39.823203Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.20272","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":"2026-07-05T10:55:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X9+G5EjCor48oyaQ3VgUbPndyheuykqIIYLTn+gkAmSOduSX5Sp1Fi8QUnZid7yjGTc/I3z5zDYRrzdXdMP6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:39:26.441860Z"},"content_sha256":"cbda553dcb74ec9af3d6363da795b123c51b0d985045bb571c9803bb875fbc26","schema_version":"1.0","event_id":"sha256:cbda553dcb74ec9af3d6363da795b123c51b0d985045bb571c9803bb875fbc26"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:4FNLQG7UJMA64DNXN24MJV4X2S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Growth of a Black Hole in a Scalar Field Cosmology","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Jake Doherty, Miguel Gracia-Linares, Pablo Laguna","submitted_at":"2025-04-28T21:31:11Z","abstract_excerpt":"We present a numerical relativity study of the accretion properties of a non-spinning black hole in a cosmology driven by a scalar field. The simulations are carried out with a modified moving-puncture gauge condition suitable for cosmological space-times. We considered a scalar field with potential $ V=\\lambda \\,\\varphi^4/4$ and derived the black hole mass growth formula for this scenario using the dynamical horizon framework. As with perturbative studies, we find that the accretion rate $\\dot M \\propto M^2$ with $M$ the mass of the black hole, and that $\\dot M \\propto \\dot\\varphi^2$. We veri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20272","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/2504.20272/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":"2026-07-05T10:55:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gx/CpomgbEOrC7YW7bq6usbe09czHFKQxPT3OFaQIEFLPqsQnSvZ7xuRzvaKghUSppzrAeOER6OlYoMLSp1RDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:39:26.442390Z"},"content_sha256":"40b7821a44b1060af071698cbd39c5f231334543a640bceafe02e1592e5956f1","schema_version":"1.0","event_id":"sha256:40b7821a44b1060af071698cbd39c5f231334543a640bceafe02e1592e5956f1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4FNLQG7UJMA64DNXN24MJV4X2S/bundle.json","state_url":"https://pith.science/pith/4FNLQG7UJMA64DNXN24MJV4X2S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4FNLQG7UJMA64DNXN24MJV4X2S/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":"2026-08-01T12:39:26Z","links":{"resolver":"https://pith.science/pith/4FNLQG7UJMA64DNXN24MJV4X2S","bundle":"https://pith.science/pith/4FNLQG7UJMA64DNXN24MJV4X2S/bundle.json","state":"https://pith.science/pith/4FNLQG7UJMA64DNXN24MJV4X2S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4FNLQG7UJMA64DNXN24MJV4X2S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:4FNLQG7UJMA64DNXN24MJV4X2S","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":"aa7ef13c207f6376fcd9f7d0e6a215f39feab2c6bdb44465c052fd0567f29af1","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-04-28T21:31:11Z","title_canon_sha256":"fa565ad378d731d881aeb00aec65c176058450d109304cf3b927833567de3c2a"},"schema_version":"1.0","source":{"id":"2504.20272","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20272","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20272v1","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20272","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_12","alias_value":"4FNLQG7UJMA6","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_16","alias_value":"4FNLQG7UJMA64DNX","created_at":"2026-07-05T10:55:39Z"},{"alias_kind":"pith_short_8","alias_value":"4FNLQG7U","created_at":"2026-07-05T10:55:39Z"}],"graph_snapshots":[{"event_id":"sha256:40b7821a44b1060af071698cbd39c5f231334543a640bceafe02e1592e5956f1","target":"graph","created_at":"2026-07-05T10:55:39Z","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/2504.20272/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a numerical relativity study of the accretion properties of a non-spinning black hole in a cosmology driven by a scalar field. The simulations are carried out with a modified moving-puncture gauge condition suitable for cosmological space-times. We considered a scalar field with potential $ V=\\lambda \\,\\varphi^4/4$ and derived the black hole mass growth formula for this scenario using the dynamical horizon framework. As with perturbative studies, we find that the accretion rate $\\dot M \\propto M^2$ with $M$ the mass of the black hole, and that $\\dot M \\propto \\dot\\varphi^2$. We veri","authors_text":"Jake Doherty, Miguel Gracia-Linares, Pablo Laguna","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-04-28T21:31:11Z","title":"Growth of a Black Hole in a Scalar Field Cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20272","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:cbda553dcb74ec9af3d6363da795b123c51b0d985045bb571c9803bb875fbc26","target":"record","created_at":"2026-07-05T10:55:39Z","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":"aa7ef13c207f6376fcd9f7d0e6a215f39feab2c6bdb44465c052fd0567f29af1","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-04-28T21:31:11Z","title_canon_sha256":"fa565ad378d731d881aeb00aec65c176058450d109304cf3b927833567de3c2a"},"schema_version":"1.0","source":{"id":"2504.20272","kind":"arxiv","version":1}},"canonical_sha256":"e15ab81bf44b01ee0db76eb8c4d797d4aceb544dd5b1629cf543f6bc423e4317","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e15ab81bf44b01ee0db76eb8c4d797d4aceb544dd5b1629cf543f6bc423e4317","first_computed_at":"2026-07-05T10:55:39.823203Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:55:39.823203Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tpO4q/kgyw0S0EfUGfCuCTxl8GmptCJTZ89KUqytrnBQfeF35LSafxHlCpPZGj6fl7AkMyxTgxo0lCSHFFGtBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:55:39.823699Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.20272","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cbda553dcb74ec9af3d6363da795b123c51b0d985045bb571c9803bb875fbc26","sha256:40b7821a44b1060af071698cbd39c5f231334543a640bceafe02e1592e5956f1"],"state_sha256":"c118aef1d4c97297bcbdd733f253a55296868aa44bbdfe659c96e4ae87b79dd8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"irzghuw9feyUvhXbkJITpGWvoJRWFvARt6BigAr5NIttBzV0QB8M2KMj31T4cLut8ofno6NFdAqH9+13fS4JBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T12:39:26.450453Z","bundle_sha256":"8da26e9713347434e460cb6031e6a9a75140730387b2343c45c4fa964a657ad4"}}