{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:SYVFEA4MPGCMMKGSHIFTVQMVWH","short_pith_number":"pith:SYVFEA4M","canonical_record":{"source":{"id":"2110.11997","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-10-22T18:21:47Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"9b2e6385b0e48e3e88d3bf77b7ff0dc1f94899bd050c88e669613759c30ab864","abstract_canon_sha256":"839d75fbc50d330d8a8489d592e6add481100c730a631096feca3cad21112113"},"schema_version":"1.0"},"canonical_sha256":"962a52038c7984c628d23a0b3ac195b1fba092f88492fd14fade3ca614eff351","source":{"kind":"arxiv","id":"2110.11997","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.11997","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"2110.11997v2","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.11997","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"SYVFEA4MPGCM","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_16","alias_value":"SYVFEA4MPGCMMKGS","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_8","alias_value":"SYVFEA4M","created_at":"2026-07-05T04:03:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:SYVFEA4MPGCMMKGSHIFTVQMVWH","target":"record","payload":{"canonical_record":{"source":{"id":"2110.11997","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-10-22T18:21:47Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"9b2e6385b0e48e3e88d3bf77b7ff0dc1f94899bd050c88e669613759c30ab864","abstract_canon_sha256":"839d75fbc50d330d8a8489d592e6add481100c730a631096feca3cad21112113"},"schema_version":"1.0"},"canonical_sha256":"962a52038c7984c628d23a0b3ac195b1fba092f88492fd14fade3ca614eff351","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:03:54.395823Z","signature_b64":"vrTJWMm9bbK3qzBJF0PC79O3yNWzH4SA9JMtjOt0U3Q+LIr4EV4T7UHhGYvcRmYcvtQLsCtwWvVD+HaDwgeMBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"962a52038c7984c628d23a0b3ac195b1fba092f88492fd14fade3ca614eff351","last_reissued_at":"2026-07-05T04:03:54.395346Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:03:54.395346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2110.11997","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":"2026-07-05T04:03:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UJ5a2Jq+HUJdnWs0w35kgU8YMk+CPj1u05fT/UVOpizfQph6L4fBMr2gczGIyN63ZUB2QNy/aW7lXjnXWrOGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-16T21:51:49.671800Z"},"content_sha256":"32707cd815423505d3711cd43a3bfd5feeb9911cd97af5cb87a44dd18aa10f3a","schema_version":"1.0","event_id":"sha256:32707cd815423505d3711cd43a3bfd5feeb9911cd97af5cb87a44dd18aa10f3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:SYVFEA4MPGCMMKGSHIFTVQMVWH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can fermion-boson stars reconcile multi-messenger observations of compact stars?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","astro-ph.SR"],"primary_cat":"gr-qc","authors_text":"Fabrizio Di Giovanni, Jos\\'e Antonio Font, Nicolas Sanchis-Gual, Pablo Cerd\\'a-Dur\\'an","submitted_at":"2021-10-22T18:21:47Z","abstract_excerpt":"Mixed fermion-boson stars are stable, horizonless, everywhere regular solutions of the coupled Einstein-(complex, massive) Klein-Gordon-Euler system. While isolated neutron stars and boson stars are uniquely determined by their central energy density, mixed configurations conform an extended parameter space that depends on the combination of the number of fermions and (ultra-light) bosons. The wider possibilities offered by fermion-boson stars could help explain the tension in the measurements of neutron star masses and radii reported in recent multi-messenger observations and nuclear-physics "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.11997","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/2110.11997/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":"2026-07-05T04:03:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z5xEvrN/EFK6lSUVdrFBZIE+e+6HbqLKmYVdrQFiVziF3CLO6H5AmXOxZEWjZ1Cd+oPxFNMUvRAhJXv56sFGAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-16T21:51:49.672173Z"},"content_sha256":"f16e02ae6845a8ae16515ee23145eccaedc36cee4f58980f35deb5712e31b2fe","schema_version":"1.0","event_id":"sha256:f16e02ae6845a8ae16515ee23145eccaedc36cee4f58980f35deb5712e31b2fe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/bundle.json","state_url":"https://pith.science/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/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":"2026-07-16T21:51:49Z","links":{"resolver":"https://pith.science/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH","bundle":"https://pith.science/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/bundle.json","state":"https://pith.science/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SYVFEA4MPGCMMKGSHIFTVQMVWH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:SYVFEA4MPGCMMKGSHIFTVQMVWH","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":"839d75fbc50d330d8a8489d592e6add481100c730a631096feca3cad21112113","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-10-22T18:21:47Z","title_canon_sha256":"9b2e6385b0e48e3e88d3bf77b7ff0dc1f94899bd050c88e669613759c30ab864"},"schema_version":"1.0","source":{"id":"2110.11997","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.11997","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"2110.11997v2","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.11997","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"SYVFEA4MPGCM","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_16","alias_value":"SYVFEA4MPGCMMKGS","created_at":"2026-07-05T04:03:54Z"},{"alias_kind":"pith_short_8","alias_value":"SYVFEA4M","created_at":"2026-07-05T04:03:54Z"}],"graph_snapshots":[{"event_id":"sha256:f16e02ae6845a8ae16515ee23145eccaedc36cee4f58980f35deb5712e31b2fe","target":"graph","created_at":"2026-07-05T04:03:54Z","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/2110.11997/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Mixed fermion-boson stars are stable, horizonless, everywhere regular solutions of the coupled Einstein-(complex, massive) Klein-Gordon-Euler system. While isolated neutron stars and boson stars are uniquely determined by their central energy density, mixed configurations conform an extended parameter space that depends on the combination of the number of fermions and (ultra-light) bosons. The wider possibilities offered by fermion-boson stars could help explain the tension in the measurements of neutron star masses and radii reported in recent multi-messenger observations and nuclear-physics ","authors_text":"Fabrizio Di Giovanni, Jos\\'e Antonio Font, Nicolas Sanchis-Gual, Pablo Cerd\\'a-Dur\\'an","cross_cats":["astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-10-22T18:21:47Z","title":"Can fermion-boson stars reconcile multi-messenger observations of compact stars?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.11997","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":"sha256:32707cd815423505d3711cd43a3bfd5feeb9911cd97af5cb87a44dd18aa10f3a","target":"record","created_at":"2026-07-05T04:03:54Z","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":"839d75fbc50d330d8a8489d592e6add481100c730a631096feca3cad21112113","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-10-22T18:21:47Z","title_canon_sha256":"9b2e6385b0e48e3e88d3bf77b7ff0dc1f94899bd050c88e669613759c30ab864"},"schema_version":"1.0","source":{"id":"2110.11997","kind":"arxiv","version":2}},"canonical_sha256":"962a52038c7984c628d23a0b3ac195b1fba092f88492fd14fade3ca614eff351","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"962a52038c7984c628d23a0b3ac195b1fba092f88492fd14fade3ca614eff351","first_computed_at":"2026-07-05T04:03:54.395346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:03:54.395346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vrTJWMm9bbK3qzBJF0PC79O3yNWzH4SA9JMtjOt0U3Q+LIr4EV4T7UHhGYvcRmYcvtQLsCtwWvVD+HaDwgeMBw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:03:54.395823Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.11997","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32707cd815423505d3711cd43a3bfd5feeb9911cd97af5cb87a44dd18aa10f3a","sha256:f16e02ae6845a8ae16515ee23145eccaedc36cee4f58980f35deb5712e31b2fe"],"state_sha256":"23e2c5d529448eb92af988476580ceb295e68afc6ee8667c9d993f4b82e1e837"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p08bqCKpEL/NzE7Lymh8t329jNm1/VV6++53W51jRqgPmvZ8hYsdCFdV0PDD5tRc4wm89Rv7DG0MN/aQ0Jb6DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-16T21:51:49.674246Z","bundle_sha256":"e43ae742879a48f460b29b6abb8f3fa1a1730066f895fab720af1adbf24a5ed6"}}