{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:B5N5CQ2CEST2UYPPBPJLMZ4SB2","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":"ce67b8b846c588a149f20bb479ff22d6b350b3f93c05eb56c69c7cb0cb1b47dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-26T09:01:16Z","title_canon_sha256":"17f64384450efd58abbe5f2e9f25f335e7e7073306af6d47617f43e45276c9aa"},"schema_version":"1.0","source":{"id":"1807.10019","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10019","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10019v2","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10019","created_at":"2026-05-18T00:03:04Z"},{"alias_kind":"pith_short_12","alias_value":"B5N5CQ2CEST2","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"B5N5CQ2CEST2UYPP","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"B5N5CQ2C","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:1c646c84a6f6692b16ab12d923f41d8d9d3f2c72dd9216d558f5439086f165f3","target":"graph","created_at":"2026-05-18T00:03:04Z","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":"We construct a model for the Milky Way Galaxy composed of a stellar disc and bulge embedded in a dark-matter halo. All components are modelled as $N$-body systems with up to 8 billion equal-mass particles and integrated up to an age of 10\\,Gyr. We find that net angular-momentum of the dark-matter halo with a spin parameter of $\\lambda=0.06$ is required to form a relatively short bar ($\\sim 4$\\,kpc) with a high pattern speed (40--50\\,km\\,s$^{-1}$). By comparing our model with observations of the Milky Way Galaxy, we conclude that a disc mass of $\\sim 3.7\\times10^{10}M_{\\odot}$ and an initial bu","authors_text":"Jeroen B\\'edorf, Junichi Baba, Michiko S. Fujii, Simon Portegies Zwart","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-26T09:01:16Z","title":"Modeling the Milky Way as a Dry Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10019","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:b8cd976a0a3f3232e4c2c7f608fcaba5fd6b5f5eb6a070cc0da8ae88faf7ab2e","target":"record","created_at":"2026-05-18T00:03:04Z","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":"ce67b8b846c588a149f20bb479ff22d6b350b3f93c05eb56c69c7cb0cb1b47dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-26T09:01:16Z","title_canon_sha256":"17f64384450efd58abbe5f2e9f25f335e7e7073306af6d47617f43e45276c9aa"},"schema_version":"1.0","source":{"id":"1807.10019","kind":"arxiv","version":2}},"canonical_sha256":"0f5bd1434224a7aa61ef0bd2b667920e95f6a092992e6444a0e6554ae18a3c35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f5bd1434224a7aa61ef0bd2b667920e95f6a092992e6444a0e6554ae18a3c35","first_computed_at":"2026-05-18T00:03:04.370612Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:04.370612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ycjg2pIVlgWefTVk+PqADt1x+pBXrRrQTLbEzXtmMCDMcMBOeiTmnLkFZWC+KE+OQ7FqR5VSmWh2UYfvpEhACQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:04.371030Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10019","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8cd976a0a3f3232e4c2c7f608fcaba5fd6b5f5eb6a070cc0da8ae88faf7ab2e","sha256:1c646c84a6f6692b16ab12d923f41d8d9d3f2c72dd9216d558f5439086f165f3"],"state_sha256":"3bfe2e2629cba35a55d40a7594e197505ed8dd4137669c366a5303d51455f718"}