{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:I7HNLZADBS5OQTO6X5QOAXTV43","short_pith_number":"pith:I7HNLZAD","schema_version":"1.0","canonical_sha256":"47ced5e4030cbae84ddebf60e05e75e6c935fd2ec7366f8eed6c3b3f3214fd23","source":{"kind":"arxiv","id":"astro-ph/0312424","version":2},"attestation_state":"computed","paper":{"title":"Testing dark energy beyond the cosmological constant barrier","license":"","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph","authors_text":"J. S. Alcaniz (Univ. Fed. do Rio Grande do Norte)","submitted_at":"2003-12-16T17:56:07Z","abstract_excerpt":"Although well motivated from theoretical arguments, the cosmological constant \\emph{barrier}, i.e., the imposition that the equation-of-state parameter of dark energy ($\\omega_x \\equiv p_x/\\rho_x$) is $\\geq -1$, seems to introduce bias in the parameter determination from statistical analyses of observational data. In this regard, \\emph{phantom} dark energy or \\emph{superquintessence} has been proposed in which the usual imposition $\\omega \\geq -1$ is relaxed. Here, we study possible observational limits to the \\emph{phantom} behavior of the dark energy from recent distance estimates of galaxy "},"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":"astro-ph/0312424","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-12-16T17:56:07Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"1f0e1abd4f42867b550a099ba25c3822f8f95836f2876ee73d3d196ff6a62f7b","abstract_canon_sha256":"01cdf582cc189939714671f74c018c66b9bf5f3698cefe85d2b6e45a6f1379bd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:38:00.827200Z","signature_b64":"4O1T1NJNwTYMepMs79dgOxOMYkc0SLodNz5v2st8eFJa/9WwZWgtYP9tbNFYFkYhf9WJOTJAuAiK3zYiJYANAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47ced5e4030cbae84ddebf60e05e75e6c935fd2ec7366f8eed6c3b3f3214fd23","last_reissued_at":"2026-07-04T16:38:00.826827Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:38:00.826827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Testing dark energy beyond the cosmological constant barrier","license":"","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph","authors_text":"J. S. Alcaniz (Univ. Fed. do Rio Grande do Norte)","submitted_at":"2003-12-16T17:56:07Z","abstract_excerpt":"Although well motivated from theoretical arguments, the cosmological constant \\emph{barrier}, i.e., the imposition that the equation-of-state parameter of dark energy ($\\omega_x \\equiv p_x/\\rho_x$) is $\\geq -1$, seems to introduce bias in the parameter determination from statistical analyses of observational data. In this regard, \\emph{phantom} dark energy or \\emph{superquintessence} has been proposed in which the usual imposition $\\omega \\geq -1$ is relaxed. Here, we study possible observational limits to the \\emph{phantom} behavior of the dark energy from recent distance estimates of galaxy "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0312424","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/astro-ph/0312424/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":"astro-ph/0312424","created_at":"2026-07-04T16:38:00.826889+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0312424v2","created_at":"2026-07-04T16:38:00.826889+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0312424","created_at":"2026-07-04T16:38:00.826889+00:00"},{"alias_kind":"pith_short_12","alias_value":"I7HNLZADBS5O","created_at":"2026-07-04T16:38:00.826889+00:00"},{"alias_kind":"pith_short_16","alias_value":"I7HNLZADBS5OQTO6","created_at":"2026-07-04T16:38:00.826889+00:00"},{"alias_kind":"pith_short_8","alias_value":"I7HNLZAD","created_at":"2026-07-04T16:38:00.826889+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/I7HNLZADBS5OQTO6X5QOAXTV43","json":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43.json","graph_json":"https://pith.science/api/pith-number/I7HNLZADBS5OQTO6X5QOAXTV43/graph.json","events_json":"https://pith.science/api/pith-number/I7HNLZADBS5OQTO6X5QOAXTV43/events.json","paper":"https://pith.science/paper/I7HNLZAD"},"agent_actions":{"view_html":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43","download_json":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43.json","view_paper":"https://pith.science/paper/I7HNLZAD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0312424&json=true","fetch_graph":"https://pith.science/api/pith-number/I7HNLZADBS5OQTO6X5QOAXTV43/graph.json","fetch_events":"https://pith.science/api/pith-number/I7HNLZADBS5OQTO6X5QOAXTV43/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43/action/timestamp_anchor","attest_storage":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43/action/storage_attestation","attest_author":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43/action/author_attestation","sign_citation":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43/action/citation_signature","submit_replication":"https://pith.science/pith/I7HNLZADBS5OQTO6X5QOAXTV43/action/replication_record"}},"created_at":"2026-07-04T16:38:00.826889+00:00","updated_at":"2026-07-04T16:38:00.826889+00:00"}