{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:53KF4HSHGXJQFHSORNNKYDVN45","short_pith_number":"pith:53KF4HSH","schema_version":"1.0","canonical_sha256":"eed45e1e4735d3029e4e8b5aac0eade77dc7d644bb909cc06ead327f0a750a34","source":{"kind":"arxiv","id":"1910.06590","version":1},"attestation_state":"computed","paper":{"title":"A Population of Neutron Star Ultraluminous X-ray Sources with A Helium Star Companion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Xiang-Dong Li, Yong Shao, Zi-Gao Dai","submitted_at":"2019-10-15T08:28:14Z","abstract_excerpt":"It was recently proposed that a significant fraction of ultraluminous X-ray sources (ULXs) actually host a neutron star (NS) accretor. We have performed a systematic study on the NS ULX population in Milky Way-like galaxies, by combining binary population synthesis and detailed stellar evolution calculations. Besides a normal star, the ULX donor can be a helium star (the hydrogen envelope of its progenitor star was stripped during previous common envelope evolution) if the NS is accreting at a super-Eddington rate via Roche lobe overflow. We find that the NS$-$helium star binaries can signific"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1910.06590","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-10-15T08:28:14Z","cross_cats_sorted":[],"title_canon_sha256":"607baba657323e4e32bb0c434d381995606c408a7c6d0f2dcd1a48d329841571","abstract_canon_sha256":"b1ba93857e0e9aac415dd5c6100f2230a9cc07c0136fdc5c362936a3bd35330e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:31:24.280468Z","signature_b64":"QiFAKKPhdymKXzvzgzDABaWkv019Hr4OMx7BruVGjn82ByLNNLZYMLTBhnYbgGSMFSV9BYrSZPwzLRhKoTW2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eed45e1e4735d3029e4e8b5aac0eade77dc7d644bb909cc06ead327f0a750a34","last_reissued_at":"2026-07-05T00:31:24.279974Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:31:24.279974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Population of Neutron Star Ultraluminous X-ray Sources with A Helium Star Companion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Xiang-Dong Li, Yong Shao, Zi-Gao Dai","submitted_at":"2019-10-15T08:28:14Z","abstract_excerpt":"It was recently proposed that a significant fraction of ultraluminous X-ray sources (ULXs) actually host a neutron star (NS) accretor. We have performed a systematic study on the NS ULX population in Milky Way-like galaxies, by combining binary population synthesis and detailed stellar evolution calculations. Besides a normal star, the ULX donor can be a helium star (the hydrogen envelope of its progenitor star was stripped during previous common envelope evolution) if the NS is accreting at a super-Eddington rate via Roche lobe overflow. We find that the NS$-$helium star binaries can signific"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.06590","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/1910.06590/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1910.06590","created_at":"2026-07-05T00:31:24.280033+00:00"},{"alias_kind":"arxiv_version","alias_value":"1910.06590v1","created_at":"2026-07-05T00:31:24.280033+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.06590","created_at":"2026-07-05T00:31:24.280033+00:00"},{"alias_kind":"pith_short_12","alias_value":"53KF4HSHGXJQ","created_at":"2026-07-05T00:31:24.280033+00:00"},{"alias_kind":"pith_short_16","alias_value":"53KF4HSHGXJQFHSO","created_at":"2026-07-05T00:31:24.280033+00:00"},{"alias_kind":"pith_short_8","alias_value":"53KF4HSH","created_at":"2026-07-05T00:31:24.280033+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45","json":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45.json","graph_json":"https://pith.science/api/pith-number/53KF4HSHGXJQFHSORNNKYDVN45/graph.json","events_json":"https://pith.science/api/pith-number/53KF4HSHGXJQFHSORNNKYDVN45/events.json","paper":"https://pith.science/paper/53KF4HSH"},"agent_actions":{"view_html":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45","download_json":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45.json","view_paper":"https://pith.science/paper/53KF4HSH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1910.06590&json=true","fetch_graph":"https://pith.science/api/pith-number/53KF4HSHGXJQFHSORNNKYDVN45/graph.json","fetch_events":"https://pith.science/api/pith-number/53KF4HSHGXJQFHSORNNKYDVN45/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45/action/timestamp_anchor","attest_storage":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45/action/storage_attestation","attest_author":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45/action/author_attestation","sign_citation":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45/action/citation_signature","submit_replication":"https://pith.science/pith/53KF4HSHGXJQFHSORNNKYDVN45/action/replication_record"}},"created_at":"2026-07-05T00:31:24.280033+00:00","updated_at":"2026-07-05T00:31:24.280033+00:00"}