{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:SIA6IAT3TG77FGDUL3YZ4HLKNP","short_pith_number":"pith:SIA6IAT3","schema_version":"1.0","canonical_sha256":"9201e4027b99bff298745ef19e1d6a6bd7c90f0105673added8e01b0d94b601e","source":{"kind":"arxiv","id":"2102.03369","version":2},"attestation_state":"computed","paper":{"title":"The origin of metal-poor stars on prograde disk orbits in FIRE simulations of Milky Way-mass galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew Wetzel, Claude-Andr\\'e Faucher-Gigu\\`ere, Isaiah B. Santistevan, Jenna Samuel, Kareem El-Badry, Robyn E. Sanderson","submitted_at":"2021-02-05T19:00:05Z","abstract_excerpt":"In hierarchical structure formation, metal-poor stars in and around the Milky Way (MW) originate primarily from mergers of lower-mass galaxies. A common expectation is therefore that metal-poor stars should have isotropic, dispersion-dominated orbits that do not correlate strongly with the MW disk. However, recent observations of stars in the MW show that metal-poor ([Fe/H] < -2) stars are preferentially on prograde orbits with respect to the disk. Using the FIRE-2 suite of cosmological zoom-in simulations of MW/M31-mass galaxies, we investigate the prevalence and origin of prograde metal-poor"},"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":"2102.03369","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-05T19:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"dd99001f305d0cbf7bf9885288f35fdaf9650d4d2b01906799891942b983f82e","abstract_canon_sha256":"555c6fad961a7c934a8d06995542a7aa45da2cc499635a4087a2a72ccfaac81e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:43:17.025904Z","signature_b64":"h2a7y/IvFcmp2EvaTM4/xdD0d9vqlIIjeD8RK8BqhqUZetiIlj2agVkcK1ftCek2HT/EC2tbGQNSi0zCmIk/Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9201e4027b99bff298745ef19e1d6a6bd7c90f0105673added8e01b0d94b601e","last_reissued_at":"2026-07-05T02:43:17.025335Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:43:17.025335Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The origin of metal-poor stars on prograde disk orbits in FIRE simulations of Milky Way-mass galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew Wetzel, Claude-Andr\\'e Faucher-Gigu\\`ere, Isaiah B. Santistevan, Jenna Samuel, Kareem El-Badry, Robyn E. Sanderson","submitted_at":"2021-02-05T19:00:05Z","abstract_excerpt":"In hierarchical structure formation, metal-poor stars in and around the Milky Way (MW) originate primarily from mergers of lower-mass galaxies. A common expectation is therefore that metal-poor stars should have isotropic, dispersion-dominated orbits that do not correlate strongly with the MW disk. However, recent observations of stars in the MW show that metal-poor ([Fe/H] < -2) stars are preferentially on prograde orbits with respect to the disk. Using the FIRE-2 suite of cosmological zoom-in simulations of MW/M31-mass galaxies, we investigate the prevalence and origin of prograde metal-poor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03369","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/2102.03369/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":"2102.03369","created_at":"2026-07-05T02:43:17.025407+00:00"},{"alias_kind":"arxiv_version","alias_value":"2102.03369v2","created_at":"2026-07-05T02:43:17.025407+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.03369","created_at":"2026-07-05T02:43:17.025407+00:00"},{"alias_kind":"pith_short_12","alias_value":"SIA6IAT3TG77","created_at":"2026-07-05T02:43:17.025407+00:00"},{"alias_kind":"pith_short_16","alias_value":"SIA6IAT3TG77FGDU","created_at":"2026-07-05T02:43:17.025407+00:00"},{"alias_kind":"pith_short_8","alias_value":"SIA6IAT3","created_at":"2026-07-05T02:43:17.025407+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/SIA6IAT3TG77FGDUL3YZ4HLKNP","json":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP.json","graph_json":"https://pith.science/api/pith-number/SIA6IAT3TG77FGDUL3YZ4HLKNP/graph.json","events_json":"https://pith.science/api/pith-number/SIA6IAT3TG77FGDUL3YZ4HLKNP/events.json","paper":"https://pith.science/paper/SIA6IAT3"},"agent_actions":{"view_html":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP","download_json":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP.json","view_paper":"https://pith.science/paper/SIA6IAT3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2102.03369&json=true","fetch_graph":"https://pith.science/api/pith-number/SIA6IAT3TG77FGDUL3YZ4HLKNP/graph.json","fetch_events":"https://pith.science/api/pith-number/SIA6IAT3TG77FGDUL3YZ4HLKNP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP/action/storage_attestation","attest_author":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP/action/author_attestation","sign_citation":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP/action/citation_signature","submit_replication":"https://pith.science/pith/SIA6IAT3TG77FGDUL3YZ4HLKNP/action/replication_record"}},"created_at":"2026-07-05T02:43:17.025407+00:00","updated_at":"2026-07-05T02:43:17.025407+00:00"}