# Is dark energy changing\? > EDITORIAL DRAFT — Public editorial drafts. Source inspection and claim standing describe the recorded evidence; they do not establish independent replication or scientific consensus. A consequential question whose answer depends on observations and models\. ## Claims DESI DR2 analyses of the first three years\, combined with CMB and supernova data under a two\-parameter dark\-energy model\, strengthened the reported preference for evolving dark energy\. [^1][^2] **Standing:** tentative. **Kind:** inference. **Scope:** Specified dataset combinations and the w0–wa model\; results depend on supernova sample and cosmological assumptions\. **Limits:** DESI BAO alone is consistent with Lambda\-CDM and does not show a strong preference for evolution\. Combined\-data preferences are not a settled discovery\; unknown systematics and modeling choices remain relevant\. No data analysis was reproduced\. **Claim revision:** claim-desi-result@2 **Review:** draft; method: separate agent scoped source cross check; independent review: not recorded. Scope: Independent editorial pass within the same agent team\; not independent scientific validation or replication\. Receipt: docs\/atlas\/source\-review\-2026\-10\-13\.md - Evidence [^1] — supports; locator: Abstract\; VII \/ Dark\-energy constraints\; Fig\. 11 and Table 6\; summary. Inspection note: Relevant source sections re\-inspected by a separate editorial agent\; no scientific replication performed\. - Evidence [^2] — qualifies; locator: Paragraph beginning Taken alone and paragraph on differing dataset combinations. Inspection note: Relevant source sections re\-inspected by a separate editorial agent\; no scientific replication performed\. The separate public DESI Data Release 1 announcement reported information on 18\.7 million galaxies\, quasars and stars\, covering the first 13 months of the main survey plus survey\-validation data\. [^3] **Standing:** supported within scope. **Kind:** observation. **Scope:** DESI DR1 public release announced 19 March 2025\; distinct from the three\-year DR2 cosmology analysis\. **Limits:** This is a release\-description claim\; dataset download\, completeness and downstream updates were not tested\. **Claim revision:** claim-desi-public-data@2 **Review:** draft; method: separate agent scoped source cross check; independent review: not recorded. Scope: Independent editorial pass within the same agent team\; not independent scientific validation or replication\. Receipt: docs\/atlas\/source\-review\-2026\-10\-13\.md - Evidence [^3] — supports; locator: Key Takeaways\; object\-count paragraph\; first\-year\/main\-survey and validation coverage paragraphs. Inspection note: Relevant source sections re\-inspected by a separate editorial agent\; no scientific replication performed\. ## Open question How sensitive is the result to model choices and independent datasets\? This is a research question, not an executed experiment. ## Footnotes [^1]: DESI DR2 Results II\: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints. . Source record: source-desi-analysis-paper; lineage: lineage\-desi\-dr2\-cosmology. Kind: research paper. Published 2025-03-18; updated 2025-10-09; accessed 2026-10-13. Inspection: relevant sections; scope: Abstract\; VII \/ Dark\-energy constraints\; Fig\. 11\, Table 6\; summary\; arXiv submission\/version history. Update status: version history inspected. Source rights: full-text redistribution not\_granted; stored content bibliographic\_metadata\_and\_original\_paraphrase; media included no. Publication stage: arxiv version matched to published article. Inspected version: v3; arXiv 2503\.14738. Update checked: 2026-10-13. Retrieval limit: Relevant arXiv v3 sections inspected\; journal full text\/status and data\/code not independently reviewed\. Date note: published\_on is initial arXiv submission\, not a verified journal publication date\. DOI identifies the journal paper\. Update-check scope: arXiv v1 18 March 2025\; v2 26 March 2025\; v3 9 October 2025 states updated to match Physical Review D\. Journal correction\/retraction history was not independently checked\. [^2]: New DESI Results Strengthen Hints That Dark Energy May Evolve. . Source record: source-desi-analysis-report; lineage: lineage\-desi\-dr2\-cosmology. Kind: institutional research report. Published 2025-03-19; accessed 2026-10-13. Inspection: relevant sections; scope: DESI\-alone Lambda\-CDM compatibility\; combination with CMB\/supernovae\/lensing\; 2\.8–4\.2 sigma qualification\; distinct DR1 public release. Update status: not independently checked. Source rights: full-text redistribution not\_granted; stored content bibliographic\_metadata\_and\_original\_paraphrase; media included no. [^3]: DESI Opens Access to the Largest 3D Map of the Universe Yet. . Source record: source-desi-public-release; lineage: lineage\-desi\-dr1\-public\-release. Kind: institutional research report. Published 2025-03-19; accessed 2026-10-13. Inspection: relevant sections; scope: 18\.7M object total and category counts\; DR1 designation\; first\-13\-month coverage\; public access statement. Update status: not independently checked. Source rights: full-text redistribution not\_granted; stored content bibliographic\_metadata\_and\_original\_paraphrase; media included no. ## Related records; not used as claim evidence - More Than a Hint of Evolving Dark Energy — New Results and Data from DESI — ; source record: source-desi-dr2. Kind: collaboration research report. Published 2025-03-19; accessed 2026-10-13. Inspection: relevant sections; scope: Dated announcement\; three\-year dataset and qualified dark\-energy conclusion. Update status: not independently checked. Source rights: full-text redistribution not\_granted; stored content bibliographic\_metadata\_and\_original\_paraphrase; media included no. ## Provenance Schema: starlight.atlas.v1. Publication status: editorial draft. Collection license: not\_assigned\_pending\_owner\_review Source: frankxai/starlight-knowledge-tree@133a478962a07c2d38637a5f9eaee54ffbebdf52:data/atlas/corpus.json Content SHA256: 64cc80fc5c9ef92fbd4da1ebea30b1e7af1a8f9c3fe809db0a191671adb1e7ee Compiled: 2026-10-13