{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:2F6ANKEF2U6ELRWTQKHEF6C343","short_pith_number":"pith:2F6ANKEF","schema_version":"1.0","canonical_sha256":"d17c06a885d53c45c6d3828e42f85be6d2a2ec8161efc6fc619c446746d33c3e","source":{"kind":"arxiv","id":"astro-ph/0702662","version":2},"attestation_state":"computed","paper":{"title":"Population Synthesis Studies of Close Binary Systems Using a Variable Common Envelope Efficiency Parameter: I. Dependence upon Secondary Mass","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Kevin P. Weiler, Michael Politano","submitted_at":"2007-02-25T01:11:00Z","abstract_excerpt":"We perform population synthesis calculations of present-day post common envelope binaries (PCEBs) and zero-age cataclysmic variables (ZACVs) using a common envelope efficiency parameter, alphaCE, that is a function of secondary mass, Ms. We investigate three basic possibilities: (1) a standard constant alphaCE prescription, with alphaCE = 1.0, 0.6, 0.3, 0.2, 0.1 and 0.05, to provide a baseline for comparison, (2) a power law dependence, alphaCE = (Ms)^n, with n = 0.5, 1.0 and 2.0, and (3) a dependence in which alphaCE approaches1 for large secondary masses and alphaCE = 0 below some assumed cu"},"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":"astro-ph/0702662","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-25T01:11:00Z","cross_cats_sorted":[],"title_canon_sha256":"270a4d91e2cabd9ff36f79c6824b4df0f83e97b6c55129d9dcd720ada10975bc","abstract_canon_sha256":"ef0636570b3b3e6add50673ebff2cc01ef95c376e2b1c77fbc78882129c1b9cf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:06.235088Z","signature_b64":"EW+++uL8MrYvp2XMaxMb1r71Ib6i+5VJNJoxpdThxmenZvu1Q1w4b+4gfhT3pv9wtDY2FjVkixmnyM8fJCX7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d17c06a885d53c45c6d3828e42f85be6d2a2ec8161efc6fc619c446746d33c3e","last_reissued_at":"2026-05-18T04:29:06.234625Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:06.234625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Population Synthesis Studies of Close Binary Systems Using a Variable Common Envelope Efficiency Parameter: I. Dependence upon Secondary Mass","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Kevin P. Weiler, Michael Politano","submitted_at":"2007-02-25T01:11:00Z","abstract_excerpt":"We perform population synthesis calculations of present-day post common envelope binaries (PCEBs) and zero-age cataclysmic variables (ZACVs) using a common envelope efficiency parameter, alphaCE, that is a function of secondary mass, Ms. We investigate three basic possibilities: (1) a standard constant alphaCE prescription, with alphaCE = 1.0, 0.6, 0.3, 0.2, 0.1 and 0.05, to provide a baseline for comparison, (2) a power law dependence, alphaCE = (Ms)^n, with n = 0.5, 1.0 and 2.0, and (3) a dependence in which alphaCE approaches1 for large secondary masses and alphaCE = 0 below some assumed cu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702662","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0702662","created_at":"2026-05-18T04:29:06.234689+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702662v2","created_at":"2026-05-18T04:29:06.234689+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702662","created_at":"2026-05-18T04:29:06.234689+00:00"},{"alias_kind":"pith_short_12","alias_value":"2F6ANKEF2U6E","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_16","alias_value":"2F6ANKEF2U6ELRWT","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_8","alias_value":"2F6ANKEF","created_at":"2026-05-18T12:25:54.717736+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/2F6ANKEF2U6ELRWTQKHEF6C343","json":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343.json","graph_json":"https://pith.science/api/pith-number/2F6ANKEF2U6ELRWTQKHEF6C343/graph.json","events_json":"https://pith.science/api/pith-number/2F6ANKEF2U6ELRWTQKHEF6C343/events.json","paper":"https://pith.science/paper/2F6ANKEF"},"agent_actions":{"view_html":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343","download_json":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343.json","view_paper":"https://pith.science/paper/2F6ANKEF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0702662&json=true","fetch_graph":"https://pith.science/api/pith-number/2F6ANKEF2U6ELRWTQKHEF6C343/graph.json","fetch_events":"https://pith.science/api/pith-number/2F6ANKEF2U6ELRWTQKHEF6C343/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343/action/storage_attestation","attest_author":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343/action/author_attestation","sign_citation":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343/action/citation_signature","submit_replication":"https://pith.science/pith/2F6ANKEF2U6ELRWTQKHEF6C343/action/replication_record"}},"created_at":"2026-05-18T04:29:06.234689+00:00","updated_at":"2026-05-18T04:29:06.234689+00:00"}