{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4FLPJCIW7GJNZLVRMCFYRJ7P6O","short_pith_number":"pith:4FLPJCIW","canonical_record":{"source":{"id":"2105.07573","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-05-17T01:46:12Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"83cde9fbe15647d31c83b9d35abf577cd1aa8b81ab309b06050574df38c783cb","abstract_canon_sha256":"bb593d9c01149b424a2de676fa8799bf86de6535938905aab96191845acf2bd0"},"schema_version":"1.0"},"canonical_sha256":"e156f48916f992dcaeb1608b88a7eff38e0166bbdedb4e330832964be0c0a26e","source":{"kind":"arxiv","id":"2105.07573","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.07573","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"2105.07573v2","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.07573","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"4FLPJCIW7GJN","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_16","alias_value":"4FLPJCIW7GJNZLVR","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_8","alias_value":"4FLPJCIW","created_at":"2026-07-05T03:08:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4FLPJCIW7GJNZLVRMCFYRJ7P6O","target":"record","payload":{"canonical_record":{"source":{"id":"2105.07573","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-05-17T01:46:12Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"83cde9fbe15647d31c83b9d35abf577cd1aa8b81ab309b06050574df38c783cb","abstract_canon_sha256":"bb593d9c01149b424a2de676fa8799bf86de6535938905aab96191845acf2bd0"},"schema_version":"1.0"},"canonical_sha256":"e156f48916f992dcaeb1608b88a7eff38e0166bbdedb4e330832964be0c0a26e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:08:45.795779Z","signature_b64":"r7+aMrMyIEqcAfrdr4ZdICFN32GCJQ3LSb6JhnTgZOe3dGSxZ7wK0V2sCsfHwKuk9+BtmtCoyeIyXsGzVKvkAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e156f48916f992dcaeb1608b88a7eff38e0166bbdedb4e330832964be0c0a26e","last_reissued_at":"2026-07-05T03:08:45.795327Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:08:45.795327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.07573","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":"2026-07-05T03:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TWwcI41RrSWjWocLmdSG4Ubt3ielm4mk0Ni6VkGsHoGIyMeMwaRyT0Ee188WJPwLc2lmJIXXE4kF99DGX+vvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:18:30.853302Z"},"content_sha256":"15947557bf715782aeb2518d23bfbdb9b5b96ee9cafd80565a687f54529168f4","schema_version":"1.0","event_id":"sha256:15947557bf715782aeb2518d23bfbdb9b5b96ee9cafd80565a687f54529168f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4FLPJCIW7GJNZLVRMCFYRJ7P6O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Jos\\'e D. V. Arba\\~nil, Juan M. Z. Pretel, Ribamar R. R. Reis, Sergio E. Jor\\'as","submitted_at":"2021-05-17T01:46:12Z","abstract_excerpt":"We investigate the equilibrium and radial stability of spherically symmetric relativistic stars, considering a polytropic equation of state (EoS), within the framework of $f(R,T)$ gravity with a conservative energy-momentum tensor. Both modified stellar structure equations and Chandrasekhar's pulsation equations are derived for the $f(R,T)= R+ h(T)$ gravity model, where the function $h(T)$ assumes a specific form in order to safeguard the conservation equation for the energy-momentum tensor. The neutron star properties, such as radius, mass, binding energy and oscillation spectrum are studied "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.07573","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/2105.07573/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":"2026-07-05T03:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m70mfKHooJC8PUOXh1Lfw6/pxPScA8Zx+FNEasI/kJlIvxMuk6PStrFQR5XMfey8bQ+uAV9CDXa8+Dv3IBnLDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:18:30.853894Z"},"content_sha256":"7a55ec49dc00821f0dc7e217e0e12124ca64c9f741078d2bffb948fea248457f","schema_version":"1.0","event_id":"sha256:7a55ec49dc00821f0dc7e217e0e12124ca64c9f741078d2bffb948fea248457f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/bundle.json","state_url":"https://pith.science/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/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":"2026-08-07T12:18:30Z","links":{"resolver":"https://pith.science/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O","bundle":"https://pith.science/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/bundle.json","state":"https://pith.science/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4FLPJCIW7GJNZLVRMCFYRJ7P6O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4FLPJCIW7GJNZLVRMCFYRJ7P6O","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":"bb593d9c01149b424a2de676fa8799bf86de6535938905aab96191845acf2bd0","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-05-17T01:46:12Z","title_canon_sha256":"83cde9fbe15647d31c83b9d35abf577cd1aa8b81ab309b06050574df38c783cb"},"schema_version":"1.0","source":{"id":"2105.07573","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.07573","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"2105.07573v2","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.07573","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"4FLPJCIW7GJN","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_16","alias_value":"4FLPJCIW7GJNZLVR","created_at":"2026-07-05T03:08:45Z"},{"alias_kind":"pith_short_8","alias_value":"4FLPJCIW","created_at":"2026-07-05T03:08:45Z"}],"graph_snapshots":[{"event_id":"sha256:7a55ec49dc00821f0dc7e217e0e12124ca64c9f741078d2bffb948fea248457f","target":"graph","created_at":"2026-07-05T03:08:45Z","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/2105.07573/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the equilibrium and radial stability of spherically symmetric relativistic stars, considering a polytropic equation of state (EoS), within the framework of $f(R,T)$ gravity with a conservative energy-momentum tensor. Both modified stellar structure equations and Chandrasekhar's pulsation equations are derived for the $f(R,T)= R+ h(T)$ gravity model, where the function $h(T)$ assumes a specific form in order to safeguard the conservation equation for the energy-momentum tensor. The neutron star properties, such as radius, mass, binding energy and oscillation spectrum are studied ","authors_text":"Jos\\'e D. V. Arba\\~nil, Juan M. Z. Pretel, Ribamar R. R. Reis, Sergio E. Jor\\'as","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-05-17T01:46:12Z","title":"Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.07573","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":"sha256:15947557bf715782aeb2518d23bfbdb9b5b96ee9cafd80565a687f54529168f4","target":"record","created_at":"2026-07-05T03:08:45Z","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":"bb593d9c01149b424a2de676fa8799bf86de6535938905aab96191845acf2bd0","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-05-17T01:46:12Z","title_canon_sha256":"83cde9fbe15647d31c83b9d35abf577cd1aa8b81ab309b06050574df38c783cb"},"schema_version":"1.0","source":{"id":"2105.07573","kind":"arxiv","version":2}},"canonical_sha256":"e156f48916f992dcaeb1608b88a7eff38e0166bbdedb4e330832964be0c0a26e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e156f48916f992dcaeb1608b88a7eff38e0166bbdedb4e330832964be0c0a26e","first_computed_at":"2026-07-05T03:08:45.795327Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:08:45.795327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r7+aMrMyIEqcAfrdr4ZdICFN32GCJQ3LSb6JhnTgZOe3dGSxZ7wK0V2sCsfHwKuk9+BtmtCoyeIyXsGzVKvkAA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:08:45.795779Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.07573","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:15947557bf715782aeb2518d23bfbdb9b5b96ee9cafd80565a687f54529168f4","sha256:7a55ec49dc00821f0dc7e217e0e12124ca64c9f741078d2bffb948fea248457f"],"state_sha256":"011402a11e0f4a97ca9f6bb0c1a576b7184dc24184ca7ce86bc56931ee1cb232"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bngQaTgT2iOsK/yLuP2dr4WdiB4TujkSxeezGHbZBjgA0nXkEcn14c9DZ1Ime1ZMGMRK7uRS0mw7zX33gdGPAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T12:18:30.858100Z","bundle_sha256":"348828229d08e449e3d0e405cddaeeb17b9d83f559d7506bd4c47619a8e8a84c"}}