{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:LSABECJGKHJJYLCE3KW6F45GIC","short_pith_number":"pith:LSABECJG","canonical_record":{"source":{"id":"2509.04831","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-09-05T06:23:39Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"e639a030d641654dd3f81da85a5d8676d4e7f2d32be28711eb6bd9332c2b914c","abstract_canon_sha256":"e85644fae3415612dc9ea1a24bbb29c96e9220ac40a338204744f2937c0e4dd7"},"schema_version":"1.0"},"canonical_sha256":"5c8012092651d29c2c44daade2f3a640982334704ece5139f0c5cde8869da23d","source":{"kind":"arxiv","id":"2509.04831","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.04831","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"arxiv_version","alias_value":"2509.04831v2","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.04831","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_12","alias_value":"LSABECJGKHJJ","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_16","alias_value":"LSABECJGKHJJYLCE","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_8","alias_value":"LSABECJG","created_at":"2026-05-28T01:04:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:LSABECJGKHJJYLCE3KW6F45GIC","target":"record","payload":{"canonical_record":{"source":{"id":"2509.04831","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-09-05T06:23:39Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"e639a030d641654dd3f81da85a5d8676d4e7f2d32be28711eb6bd9332c2b914c","abstract_canon_sha256":"e85644fae3415612dc9ea1a24bbb29c96e9220ac40a338204744f2937c0e4dd7"},"schema_version":"1.0"},"canonical_sha256":"5c8012092651d29c2c44daade2f3a640982334704ece5139f0c5cde8869da23d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-28T01:04:07.372844Z","signature_b64":"unW1bj/WBbKTYddgKUors0yX29VCIvk0PJr7HgziR6SZgyVyxqwrCzah32HXzAw3bxbs3k0toH43viyuIJXqCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c8012092651d29c2c44daade2f3a640982334704ece5139f0c5cde8869da23d","last_reissued_at":"2026-05-28T01:04:07.372072Z","signature_status":"signed_v1","first_computed_at":"2026-05-28T01:04:07.372072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.04831","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-28T01:04:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qd2kHWGqYr18OKSa0xbsFtubAwzDF4LUqjvrj2t/5ZODvt2lf7tmFE6u048vL3IkG42FKONT3UIy8seLxe04Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T03:33:01.115187Z"},"content_sha256":"69689059dd70476e180282cd5531a2770e9244983f34bcfa38fdffbfb6e6ce31","schema_version":"1.0","event_id":"sha256:69689059dd70476e180282cd5531a2770e9244983f34bcfa38fdffbfb6e6ce31"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:LSABECJGKHJJYLCE3KW6F45GIC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Influence of Dark Matter on Hybrid and Twin Stars","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"H. C. Das","submitted_at":"2025-09-05T06:23:39Z","abstract_excerpt":"We investigate the impact of dark matter (DM) on hybrid and twin stars within a two-fluid framework, where DM and normal matter interact only through gravity. A self-interacting fermionic DM model is considered, while for the nuclear and quark matter we employ relativistic mean-field models and the constant sound-speed parametrization, respectively. Solving the two-fluid Tolman-Oppenheimer-Volkoff equations over a five-dimensional parameter space spanning the quark-matter transition pressure $p_t$, energy density jump $\\Delta\\epsilon$, sound speed $C_s^2$, DM particle mass $m_\\chi$, and DM fra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.04831","kind":"arxiv","version":2},"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/2509.04831/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":"2026-05-28T01:04:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OD+tTBTuNZeo3NVdYGusPTlvdnOf6B2g9HE996qngK+ZWzKFHEnUwmhHMQqcJvVd+fQI7HXSzUc5xnjxjosmDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T03:33:01.115779Z"},"content_sha256":"b87c496542fcc7941b51affb3f07d051bd223cb6b7d2c02acd11a51719e62822","schema_version":"1.0","event_id":"sha256:b87c496542fcc7941b51affb3f07d051bd223cb6b7d2c02acd11a51719e62822"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LSABECJGKHJJYLCE3KW6F45GIC/bundle.json","state_url":"https://pith.science/pith/LSABECJGKHJJYLCE3KW6F45GIC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LSABECJGKHJJYLCE3KW6F45GIC/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":"2026-08-11T03:33:01Z","links":{"resolver":"https://pith.science/pith/LSABECJGKHJJYLCE3KW6F45GIC","bundle":"https://pith.science/pith/LSABECJGKHJJYLCE3KW6F45GIC/bundle.json","state":"https://pith.science/pith/LSABECJGKHJJYLCE3KW6F45GIC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LSABECJGKHJJYLCE3KW6F45GIC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:LSABECJGKHJJYLCE3KW6F45GIC","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":"e85644fae3415612dc9ea1a24bbb29c96e9220ac40a338204744f2937c0e4dd7","cross_cats_sorted":["nucl-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-09-05T06:23:39Z","title_canon_sha256":"e639a030d641654dd3f81da85a5d8676d4e7f2d32be28711eb6bd9332c2b914c"},"schema_version":"1.0","source":{"id":"2509.04831","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.04831","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"arxiv_version","alias_value":"2509.04831v2","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.04831","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_12","alias_value":"LSABECJGKHJJ","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_16","alias_value":"LSABECJGKHJJYLCE","created_at":"2026-05-28T01:04:07Z"},{"alias_kind":"pith_short_8","alias_value":"LSABECJG","created_at":"2026-05-28T01:04:07Z"}],"graph_snapshots":[{"event_id":"sha256:b87c496542fcc7941b51affb3f07d051bd223cb6b7d2c02acd11a51719e62822","target":"graph","created_at":"2026-05-28T01:04:07Z","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/2509.04831/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the impact of dark matter (DM) on hybrid and twin stars within a two-fluid framework, where DM and normal matter interact only through gravity. A self-interacting fermionic DM model is considered, while for the nuclear and quark matter we employ relativistic mean-field models and the constant sound-speed parametrization, respectively. Solving the two-fluid Tolman-Oppenheimer-Volkoff equations over a five-dimensional parameter space spanning the quark-matter transition pressure $p_t$, energy density jump $\\Delta\\epsilon$, sound speed $C_s^2$, DM particle mass $m_\\chi$, and DM fra","authors_text":"H. C. Das","cross_cats":["nucl-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-09-05T06:23:39Z","title":"Influence of Dark Matter on Hybrid and Twin Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.04831","kind":"arxiv","version":2},"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":"sha256:69689059dd70476e180282cd5531a2770e9244983f34bcfa38fdffbfb6e6ce31","target":"record","created_at":"2026-05-28T01:04:07Z","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":"e85644fae3415612dc9ea1a24bbb29c96e9220ac40a338204744f2937c0e4dd7","cross_cats_sorted":["nucl-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-09-05T06:23:39Z","title_canon_sha256":"e639a030d641654dd3f81da85a5d8676d4e7f2d32be28711eb6bd9332c2b914c"},"schema_version":"1.0","source":{"id":"2509.04831","kind":"arxiv","version":2}},"canonical_sha256":"5c8012092651d29c2c44daade2f3a640982334704ece5139f0c5cde8869da23d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c8012092651d29c2c44daade2f3a640982334704ece5139f0c5cde8869da23d","first_computed_at":"2026-05-28T01:04:07.372072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-28T01:04:07.372072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"unW1bj/WBbKTYddgKUors0yX29VCIvk0PJr7HgziR6SZgyVyxqwrCzah32HXzAw3bxbs3k0toH43viyuIJXqCw==","signature_status":"signed_v1","signed_at":"2026-05-28T01:04:07.372844Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.04831","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69689059dd70476e180282cd5531a2770e9244983f34bcfa38fdffbfb6e6ce31","sha256:b87c496542fcc7941b51affb3f07d051bd223cb6b7d2c02acd11a51719e62822"],"state_sha256":"e06b218103102473f6d8cfcca9c3278f2e8ca677422e77dc1c8f61462b59a945"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/WCZHTUeoNfiKFbVm8ZbAMZ8jr1T2zHq2n0uM/fp3n6pU+zm7WS3C/61PKiQ0K7hxo+LWrPxJNUzFnwR6vPEAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T03:33:01.119181Z","bundle_sha256":"58282db5c7459ebe07f1a131067f47ffc4b2f9003c2ce405d7920a32b4281f44"}}