{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:7ED7VJ6DPFWMRDSCX6KCCYEY77","short_pith_number":"pith:7ED7VJ6D","schema_version":"1.0","canonical_sha256":"f907faa7c3796cc88e42bf94216098ffc3358ab1f14b09f732aee06fb3634661","source":{"kind":"arxiv","id":"2205.04273","version":2},"attestation_state":"computed","paper":{"title":"Diffstar: A Fully Parametric Physical Model for Galaxy Assembly History","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alex Alarcon, Andrew P. Hearin, Jon\\'as Chaves-Montero, Matthew R. Becker","submitted_at":"2022-05-09T13:40:55Z","abstract_excerpt":"We present Diffstar, a smooth parametric model for the in-situ star formation history (SFH) of galaxies. Diffstar is distinct from conventional SFH models that are used to interpret the spectral energy distribution (SED) of an observed galaxy, because our model is parametrized directly in terms of basic features of galaxy formation physics. The Diffstar model assumes that star formation is fueled by the accretion of gas into the dark matter halo of the galaxy, and at the foundation of Diffstar is a parametric model for halo mass assembly, Diffmah. We include parametrized ingredients for the fr"},"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":"2205.04273","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-05-09T13:40:55Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"f9daa67d9e3f1d1d2d257afff489cb6b2a8f4d0ddff2a348761eadc0e75439d2","abstract_canon_sha256":"d708d42abab47dde0ba38feec4ff2c0b46d5f92d02c4f15a2cef84d034740948"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:56:38.247040Z","signature_b64":"3Hp34IspMRi7k2lmowklRhFWC2gqbQr42V30yQPlyUSY53+dj7N6c/XjDfI3N1jgLOSAHgG7hlhIwLOP8J4HAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f907faa7c3796cc88e42bf94216098ffc3358ab1f14b09f732aee06fb3634661","last_reissued_at":"2026-07-05T05:56:38.246687Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:56:38.246687Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Diffstar: A Fully Parametric Physical Model for Galaxy Assembly History","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alex Alarcon, Andrew P. Hearin, Jon\\'as Chaves-Montero, Matthew R. Becker","submitted_at":"2022-05-09T13:40:55Z","abstract_excerpt":"We present Diffstar, a smooth parametric model for the in-situ star formation history (SFH) of galaxies. Diffstar is distinct from conventional SFH models that are used to interpret the spectral energy distribution (SED) of an observed galaxy, because our model is parametrized directly in terms of basic features of galaxy formation physics. The Diffstar model assumes that star formation is fueled by the accretion of gas into the dark matter halo of the galaxy, and at the foundation of Diffstar is a parametric model for halo mass assembly, Diffmah. We include parametrized ingredients for the fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.04273","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/2205.04273/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":"2205.04273","created_at":"2026-07-05T05:56:38.246744+00:00"},{"alias_kind":"arxiv_version","alias_value":"2205.04273v2","created_at":"2026-07-05T05:56:38.246744+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.04273","created_at":"2026-07-05T05:56:38.246744+00:00"},{"alias_kind":"pith_short_12","alias_value":"7ED7VJ6DPFWM","created_at":"2026-07-05T05:56:38.246744+00:00"},{"alias_kind":"pith_short_16","alias_value":"7ED7VJ6DPFWMRDSC","created_at":"2026-07-05T05:56:38.246744+00:00"},{"alias_kind":"pith_short_8","alias_value":"7ED7VJ6D","created_at":"2026-07-05T05:56:38.246744+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.14504","citing_title":"Forecasting neutrino mass constraints from the Nancy Grace Roman Space Telescope","ref_index":83,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77","json":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77.json","graph_json":"https://pith.science/api/pith-number/7ED7VJ6DPFWMRDSCX6KCCYEY77/graph.json","events_json":"https://pith.science/api/pith-number/7ED7VJ6DPFWMRDSCX6KCCYEY77/events.json","paper":"https://pith.science/paper/7ED7VJ6D"},"agent_actions":{"view_html":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77","download_json":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77.json","view_paper":"https://pith.science/paper/7ED7VJ6D","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2205.04273&json=true","fetch_graph":"https://pith.science/api/pith-number/7ED7VJ6DPFWMRDSCX6KCCYEY77/graph.json","fetch_events":"https://pith.science/api/pith-number/7ED7VJ6DPFWMRDSCX6KCCYEY77/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77/action/storage_attestation","attest_author":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77/action/author_attestation","sign_citation":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77/action/citation_signature","submit_replication":"https://pith.science/pith/7ED7VJ6DPFWMRDSCX6KCCYEY77/action/replication_record"}},"created_at":"2026-07-05T05:56:38.246744+00:00","updated_at":"2026-07-05T05:56:38.246744+00:00"}