{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:PTWRL5GRMZY73VOYGKK5HFPVTL","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":"95a677dd7ee26bb8220b2a0888ad4f24b3e7e5987c6095d350cb5c197e103d14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T20:00:00Z","title_canon_sha256":"7fa569598d25e6a7969cf633d06868c3de8a23822137490afd9c7f497670d07c"},"schema_version":"1.0","source":{"id":"1205.1508","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.1508","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"arxiv_version","alias_value":"1205.1508v1","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.1508","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"pith_short_12","alias_value":"PTWRL5GRMZY7","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PTWRL5GRMZY73VOY","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PTWRL5GR","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:d0af94a422c963f3d0e28fe2b240e2aa869b9427ba994d45b77aaf2b5132dd3a","target":"graph","created_at":"2026-05-18T01:57:37Z","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":"Binary populations in young star clusters show multiplicity fractions both lower and up to twice as high as those observed in the Galactic field. We follow the evolution of a population of binary stars in dense and loose star clusters starting with an invariant initial binary population and a formal multiplicity fraction of unity, and demonstrate that these models can explain the observed binary properties in Taurus, Rho-Ophiuchus, Chamaeleon, Orion, IC 348, Upper Scorpius A, Praesepe, and the Pleiades. The model needs to consider solely different birth densities for these regions. The evolved","authors_text":"Michael Marks, Pavel Kroupa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T20:00:00Z","title":"Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.1508","kind":"arxiv","version":1},"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:c527b3f2d8a22d299b171328311f9d0c51f61c70f5ff5b8a28ee74f627791110","target":"record","created_at":"2026-05-18T01:57:37Z","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":"95a677dd7ee26bb8220b2a0888ad4f24b3e7e5987c6095d350cb5c197e103d14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T20:00:00Z","title_canon_sha256":"7fa569598d25e6a7969cf633d06868c3de8a23822137490afd9c7f497670d07c"},"schema_version":"1.0","source":{"id":"1205.1508","kind":"arxiv","version":1}},"canonical_sha256":"7ced15f4d16671fdd5d83295d395f59af195b69eb176cc94656edb6205d127e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ced15f4d16671fdd5d83295d395f59af195b69eb176cc94656edb6205d127e0","first_computed_at":"2026-05-18T01:57:37.070429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:37.070429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"++V8v5Spx26bLoYEDA5G6qs4LlFQz6ezNUWI8w52WrHOeVU8l9A+rEQTgcNP3eZN7vsgRJz0TyjVgDQnZ1FRBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:37.071154Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.1508","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c527b3f2d8a22d299b171328311f9d0c51f61c70f5ff5b8a28ee74f627791110","sha256:d0af94a422c963f3d0e28fe2b240e2aa869b9427ba994d45b77aaf2b5132dd3a"],"state_sha256":"85b903b4b9cc3732cc9f6cda5efc7f616a50dafef81df6db056d3f853a079799"}