{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:G6KYNSRR74WPO7BR2UMT4433KV","short_pith_number":"pith:G6KYNSRR","schema_version":"1.0","canonical_sha256":"379586ca31ff2cf77c31d5193e737b557d1b2a515715a56675ea883d054b78db","source":{"kind":"arxiv","id":"2407.07985","version":2},"attestation_state":"computed","paper":{"title":"Rising from the Ashes: A Metallicity-Dependent Star Formation Gap Splits the Milky Way's alpha-Sequences","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Angus Beane","submitted_at":"2024-07-10T18:34:47Z","abstract_excerpt":"The elemental abundance distribution of stars encodes the history of the gas-phase abundance in the Milky Way. Without a large, unbiased sample of highly precise stellar ages, the exact timing and nature of this history must be inferred from the abundances. In the two-dimensional plane of [alpha/Fe]-[Fe/H], it is now clear that two separate populations exist -- the low-alpha and high-alpha sequences. We propose that a brief (~300 Myr) halt in star formation within a narrow metallicity bin can lead to a bimodal [alpha/Fe] distribution at that metallicity, assuming a rapidly declining gas phase "},"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":"2407.07985","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-07-10T18:34:47Z","cross_cats_sorted":[],"title_canon_sha256":"cb18fc4dadfb9f5fcd2d08bf96f33caece733356f7336ee53ec132c7a7a5b8e5","abstract_canon_sha256":"2df4e4185ee3513fe7ef692175d59bcc454a58e54d9c30d1d57070af668230f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:19:10.285297Z","signature_b64":"aNA/7s04Uu5h1sFljJUoB/TA/uCVDeSX4Mlpk8TvFJSx9TR9dsiJFTICJUgi4SC0vppA7qMSz5z+NwEt/o/pBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"379586ca31ff2cf77c31d5193e737b557d1b2a515715a56675ea883d054b78db","last_reissued_at":"2026-07-05T10:19:10.284810Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:19:10.284810Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Rising from the Ashes: A Metallicity-Dependent Star Formation Gap Splits the Milky Way's alpha-Sequences","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Angus Beane","submitted_at":"2024-07-10T18:34:47Z","abstract_excerpt":"The elemental abundance distribution of stars encodes the history of the gas-phase abundance in the Milky Way. Without a large, unbiased sample of highly precise stellar ages, the exact timing and nature of this history must be inferred from the abundances. In the two-dimensional plane of [alpha/Fe]-[Fe/H], it is now clear that two separate populations exist -- the low-alpha and high-alpha sequences. We propose that a brief (~300 Myr) halt in star formation within a narrow metallicity bin can lead to a bimodal [alpha/Fe] distribution at that metallicity, assuming a rapidly declining gas phase "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.07985","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/2407.07985/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":"2407.07985","created_at":"2026-07-05T10:19:10.284867+00:00"},{"alias_kind":"arxiv_version","alias_value":"2407.07985v2","created_at":"2026-07-05T10:19:10.284867+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.07985","created_at":"2026-07-05T10:19:10.284867+00:00"},{"alias_kind":"pith_short_12","alias_value":"G6KYNSRR74WP","created_at":"2026-07-05T10:19:10.284867+00:00"},{"alias_kind":"pith_short_16","alias_value":"G6KYNSRR74WPO7BR","created_at":"2026-07-05T10:19:10.284867+00:00"},{"alias_kind":"pith_short_8","alias_value":"G6KYNSRR","created_at":"2026-07-05T10:19:10.284867+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2501.12342","citing_title":"Effect of gas accretion on $\\alpha$-element bimodality in Milky Way-mass galaxies in the FIRE-2 simulations","ref_index":9,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV","json":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV.json","graph_json":"https://pith.science/api/pith-number/G6KYNSRR74WPO7BR2UMT4433KV/graph.json","events_json":"https://pith.science/api/pith-number/G6KYNSRR74WPO7BR2UMT4433KV/events.json","paper":"https://pith.science/paper/G6KYNSRR"},"agent_actions":{"view_html":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV","download_json":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV.json","view_paper":"https://pith.science/paper/G6KYNSRR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2407.07985&json=true","fetch_graph":"https://pith.science/api/pith-number/G6KYNSRR74WPO7BR2UMT4433KV/graph.json","fetch_events":"https://pith.science/api/pith-number/G6KYNSRR74WPO7BR2UMT4433KV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV/action/storage_attestation","attest_author":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV/action/author_attestation","sign_citation":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV/action/citation_signature","submit_replication":"https://pith.science/pith/G6KYNSRR74WPO7BR2UMT4433KV/action/replication_record"}},"created_at":"2026-07-05T10:19:10.284867+00:00","updated_at":"2026-07-05T10:19:10.284867+00:00"}