{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:YWDWSZDIUPZ6ITWYHF6X25RDDI","short_pith_number":"pith:YWDWSZDI","schema_version":"1.0","canonical_sha256":"c587696468a3f3e44ed8397d7d76231a232a812925530a15fcd0eb11e0a24869","source":{"kind":"arxiv","id":"1706.01706","version":2},"attestation_state":"computed","paper":{"title":"Cosmological constraints on a unified dark matter-energy scalar field model with fast transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Alberto Rozas-Fern\\'andez, Iker Leanizbarrutia, Ismael Tereno","submitted_at":"2017-06-06T11:42:03Z","abstract_excerpt":"We test the viability of a single fluid cosmological model containing a transition from a dark-matter-like regime to a dark-energy-like regime. The fluid is a k-essence scalar field with a well-defined Lagrangian. We constrain its model parameters with a combination of geometric probes and conclude that the evidence for this model is similar to the evidence for $\\Lambda$CDM. In addition, we find a lower bound for the rapidity of the transition, implying that fast transitions are favored with respect to slow ones even at background level."},"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":"1706.01706","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-06-06T11:42:03Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ca3dab168c5398a094084d677690ff35750243e6d1e8ac424e80c483e81fd21b","abstract_canon_sha256":"092096bad0351c977b2b218d21050780c8ba01101b2879254a7c91eb89553659"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:12.802928Z","signature_b64":"7hunrbkmSq5RzXQM/iDBvobosNtd6e6GCkk+kRPkcUixJUvCr1etaw3rMc89snobWH47a/ND+YxQLgN8IoGjCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c587696468a3f3e44ed8397d7d76231a232a812925530a15fcd0eb11e0a24869","last_reissued_at":"2026-05-18T00:40:12.802373Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:12.802373Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cosmological constraints on a unified dark matter-energy scalar field model with fast transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Alberto Rozas-Fern\\'andez, Iker Leanizbarrutia, Ismael Tereno","submitted_at":"2017-06-06T11:42:03Z","abstract_excerpt":"We test the viability of a single fluid cosmological model containing a transition from a dark-matter-like regime to a dark-energy-like regime. The fluid is a k-essence scalar field with a well-defined Lagrangian. We constrain its model parameters with a combination of geometric probes and conclude that the evidence for this model is similar to the evidence for $\\Lambda$CDM. In addition, we find a lower bound for the rapidity of the transition, implying that fast transitions are favored with respect to slow ones even at background level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.01706","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":""},"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":"1706.01706","created_at":"2026-05-18T00:40:12.802457+00:00"},{"alias_kind":"arxiv_version","alias_value":"1706.01706v2","created_at":"2026-05-18T00:40:12.802457+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.01706","created_at":"2026-05-18T00:40:12.802457+00:00"},{"alias_kind":"pith_short_12","alias_value":"YWDWSZDIUPZ6","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_16","alias_value":"YWDWSZDIUPZ6ITWY","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_8","alias_value":"YWDWSZDI","created_at":"2026-05-18T12:31:56.362134+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/YWDWSZDIUPZ6ITWYHF6X25RDDI","json":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI.json","graph_json":"https://pith.science/api/pith-number/YWDWSZDIUPZ6ITWYHF6X25RDDI/graph.json","events_json":"https://pith.science/api/pith-number/YWDWSZDIUPZ6ITWYHF6X25RDDI/events.json","paper":"https://pith.science/paper/YWDWSZDI"},"agent_actions":{"view_html":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI","download_json":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI.json","view_paper":"https://pith.science/paper/YWDWSZDI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1706.01706&json=true","fetch_graph":"https://pith.science/api/pith-number/YWDWSZDIUPZ6ITWYHF6X25RDDI/graph.json","fetch_events":"https://pith.science/api/pith-number/YWDWSZDIUPZ6ITWYHF6X25RDDI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI/action/storage_attestation","attest_author":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI/action/author_attestation","sign_citation":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI/action/citation_signature","submit_replication":"https://pith.science/pith/YWDWSZDIUPZ6ITWYHF6X25RDDI/action/replication_record"}},"created_at":"2026-05-18T00:40:12.802457+00:00","updated_at":"2026-05-18T00:40:12.802457+00:00"}