{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BOPVOTRFIILQWB76UJ72J3HR6B","short_pith_number":"pith:BOPVOTRF","canonical_record":{"source":{"id":"1804.08785","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-04-24T00:10:43Z","cross_cats_sorted":[],"title_canon_sha256":"5f2db78cb8dc7b183514eca56aac1a4ea3e0a7be813b8848b2f92566ea79ef56","abstract_canon_sha256":"e3239cc2fee9c179d7a85fb8f495186f234857ae1ca7c5d91bd17987f690fcbc"},"schema_version":"1.0"},"canonical_sha256":"0b9f574e2542170b07fea27fa4ecf1f047e1e994365b6938ba5598349022dc7a","source":{"kind":"arxiv","id":"1804.08785","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08785","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08785v2","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08785","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"pith_short_12","alias_value":"BOPVOTRFIILQ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BOPVOTRFIILQWB76","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BOPVOTRF","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BOPVOTRFIILQWB76UJ72J3HR6B","target":"record","payload":{"canonical_record":{"source":{"id":"1804.08785","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-04-24T00:10:43Z","cross_cats_sorted":[],"title_canon_sha256":"5f2db78cb8dc7b183514eca56aac1a4ea3e0a7be813b8848b2f92566ea79ef56","abstract_canon_sha256":"e3239cc2fee9c179d7a85fb8f495186f234857ae1ca7c5d91bd17987f690fcbc"},"schema_version":"1.0"},"canonical_sha256":"0b9f574e2542170b07fea27fa4ecf1f047e1e994365b6938ba5598349022dc7a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:58.418738Z","signature_b64":"Q7kiJUt0SP8GdJwtqZN5tLxMw8HalUKcq956XkjrbxrATHl5cb8RaoN26eGKzod1HFuPDJZANSI3tS/QVSOVCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b9f574e2542170b07fea27fa4ecf1f047e1e994365b6938ba5598349022dc7a","last_reissued_at":"2026-05-18T00:12:58.418081Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:58.418081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.08785","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":"2026-05-18T00:12:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ci/kEa8f/ry+UG0Lf22eoyFm/BQd2ITrdsykgytP4pgIB3LyFoU41zxJvbByWqU5Z7iMpqGlDaGF2seXab9OBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:12:37.921708Z"},"content_sha256":"fbaad6906ffb2eb72c4eea5132a4c5f76bdcf579d9eaf9aa11c227ad290e04ed","schema_version":"1.0","event_id":"sha256:fbaad6906ffb2eb72c4eea5132a4c5f76bdcf579d9eaf9aa11c227ad290e04ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BOPVOTRFIILQWB76UJ72J3HR6B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A comparative study of Compact Objects using 3 models: Walecka Model, PAL Model, and M.I.T. Bag Model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Alex Quadros, Cesar Augusto Zen Vasconcellos, Dimiter Hadjimichef, Fabio Kopp, Guilherme Volkmer, Magno Machado, Moises Razeira","submitted_at":"2018-04-24T00:10:43Z","abstract_excerpt":"Compact objects are the name used to classify the following objects: white dwarf, neutron star and black holes. In addition to them, some authors have suggested that in the core of a neutron star we may have the quarks u,d,s and c. In this work we investigate the structure of neutron star and strange star, described by the Tolman-Openheimer-Volkof equations. For the neutron star, we used the relativistic EoS from Walecka's model and the non-relativistic EoS PAL model. For the strange star, we used the M.I.T. bag model. We obtain results for the mass-radius relation and then we compared ours re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08785","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":""},"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":"2026-05-18T00:12:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n0gziIN5rjX3Wpf+QvI/ZgjQf6OshGEubIWyAS471Yw2xSUNPHol6yL8cD62P9eHhhtj9BZFa+069BGDCdHkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:12:37.922063Z"},"content_sha256":"565463789d296848483a628ab4194e1b608ca6e9ef8a4fd4b00a7b7ebbfa4cdf","schema_version":"1.0","event_id":"sha256:565463789d296848483a628ab4194e1b608ca6e9ef8a4fd4b00a7b7ebbfa4cdf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BOPVOTRFIILQWB76UJ72J3HR6B/bundle.json","state_url":"https://pith.science/pith/BOPVOTRFIILQWB76UJ72J3HR6B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BOPVOTRFIILQWB76UJ72J3HR6B/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":"2026-05-30T22:12:37Z","links":{"resolver":"https://pith.science/pith/BOPVOTRFIILQWB76UJ72J3HR6B","bundle":"https://pith.science/pith/BOPVOTRFIILQWB76UJ72J3HR6B/bundle.json","state":"https://pith.science/pith/BOPVOTRFIILQWB76UJ72J3HR6B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BOPVOTRFIILQWB76UJ72J3HR6B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BOPVOTRFIILQWB76UJ72J3HR6B","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":"e3239cc2fee9c179d7a85fb8f495186f234857ae1ca7c5d91bd17987f690fcbc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-04-24T00:10:43Z","title_canon_sha256":"5f2db78cb8dc7b183514eca56aac1a4ea3e0a7be813b8848b2f92566ea79ef56"},"schema_version":"1.0","source":{"id":"1804.08785","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08785","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08785v2","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08785","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"pith_short_12","alias_value":"BOPVOTRFIILQ","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BOPVOTRFIILQWB76","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BOPVOTRF","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:565463789d296848483a628ab4194e1b608ca6e9ef8a4fd4b00a7b7ebbfa4cdf","target":"graph","created_at":"2026-05-18T00:12:58Z","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":"Compact objects are the name used to classify the following objects: white dwarf, neutron star and black holes. In addition to them, some authors have suggested that in the core of a neutron star we may have the quarks u,d,s and c. In this work we investigate the structure of neutron star and strange star, described by the Tolman-Openheimer-Volkof equations. For the neutron star, we used the relativistic EoS from Walecka's model and the non-relativistic EoS PAL model. For the strange star, we used the M.I.T. bag model. We obtain results for the mass-radius relation and then we compared ours re","authors_text":"Alex Quadros, Cesar Augusto Zen Vasconcellos, Dimiter Hadjimichef, Fabio Kopp, Guilherme Volkmer, Magno Machado, Moises Razeira","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-04-24T00:10:43Z","title":"A comparative study of Compact Objects using 3 models: Walecka Model, PAL Model, and M.I.T. Bag Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08785","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:fbaad6906ffb2eb72c4eea5132a4c5f76bdcf579d9eaf9aa11c227ad290e04ed","target":"record","created_at":"2026-05-18T00:12:58Z","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":"e3239cc2fee9c179d7a85fb8f495186f234857ae1ca7c5d91bd17987f690fcbc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-04-24T00:10:43Z","title_canon_sha256":"5f2db78cb8dc7b183514eca56aac1a4ea3e0a7be813b8848b2f92566ea79ef56"},"schema_version":"1.0","source":{"id":"1804.08785","kind":"arxiv","version":2}},"canonical_sha256":"0b9f574e2542170b07fea27fa4ecf1f047e1e994365b6938ba5598349022dc7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b9f574e2542170b07fea27fa4ecf1f047e1e994365b6938ba5598349022dc7a","first_computed_at":"2026-05-18T00:12:58.418081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:58.418081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q7kiJUt0SP8GdJwtqZN5tLxMw8HalUKcq956XkjrbxrATHl5cb8RaoN26eGKzod1HFuPDJZANSI3tS/QVSOVCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:58.418738Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.08785","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fbaad6906ffb2eb72c4eea5132a4c5f76bdcf579d9eaf9aa11c227ad290e04ed","sha256:565463789d296848483a628ab4194e1b608ca6e9ef8a4fd4b00a7b7ebbfa4cdf"],"state_sha256":"9e561e4dcb727a31aabad9817bd2367ce72a57ce823381865912d08fdc491d83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LiVkIGfpUgsC3UVKMOhBsRdaNTiDLD/a5Z8Fl+JyP6Snx9FPt6rmK1NCvM2EODN4jvlK0NiSeMdi6029zSChDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:12:37.924324Z","bundle_sha256":"a8bfce157927412e503176554251152b15103bd4a2193bd4f92d5a5a6cd3e942"}}