Research family
DESI DR1 tracers and CPL parameters
Fixed-CPL point comparisons across tracers and redshifts.
9 execution records · Latest record: 09 Oct 2026
Editorial grouping by research question. Each record preserves its original identifier, priors, method, result and status. Values have not been combined, and a signal in a single run is not a global detection.
Δχ² = reference χ² − alternative χ²
DESI DR1 comparisons of fixed CPL points with the cosmological constant.
- luminous red galaxies at effective z = 0.706 · w₀ = -0.838, wₐ = -0.62 · T-01e364c8a2dc4.08
w₀ = -0.838, wₐ = -0.62
- luminous red galaxies at effective z = 0.919 · w₀ = -0.667, wₐ = -1.09 · T-4d8348b7e64e−214.53
w₀ = -0.667, wₐ = -1.09
- quasars at effective z = 1.491 · w₀ = -0.667, wₐ = -1.09 · T-6799b1ee63f8−210.46
w₀ = -0.667, wₐ = -1.09
- luminous red galaxies at effective z = 0.51 · w₀ = -0.838, wₐ = -0.62 · T-78dd8606e8571.52
w₀ = -0.838, wₐ = -0.62
- emission-line galaxies at effective z = 1.317 · w₀ = -0.667, wₐ = -1.09 · T-7eb30a59fb20−215.07
w₀ = -0.667, wₐ = -1.09
- luminous red galaxies at effective z = 0.919 · w₀ = -0.838, wₐ = -0.62 · T-a3e242f9599d0.23
w₀ = -0.838, wₐ = -0.62
- luminous red galaxies at effective z = 0.51 · w₀ = -0.667, wₐ = -1.09 · T-b20b43ed3d0b−211.71
w₀ = -0.667, wₐ = -1.09
- luminous red galaxies at effective z = 0.706 · w₀ = -0.667, wₐ = -1.09 · T-c56aecba4b86−204.84
w₀ = -0.667, wₐ = -1.09
- emission-line galaxies at effective z = 1.317 · w₀ = -0.838, wₐ = -0.62 · T-fc965a7b3710−1.37
w₀ = -0.838, wₐ = -0.62
Each Δχ² compares the two fits within its own run. Positive values indicate a lower χ² for the alternative. Each record details the comparison and its limits.
Runs and variants
In DESI DR1, do luminous red galaxies at effective z = 0.706 favor the point w₀ = −0.838 and wₐ = −0.62 over the cosmological constant?
Δχ² = 4.08: the alternative point has a lower χ², but the improvement lies between the prespecified decision thresholds. This fixed-point comparison remains inconclusive.
In DESI DR1, do luminous red galaxies at effective z = 0.919 favor the point w₀ = −0.667 and wₐ = −1.09 over the cosmological constant?
Δχ² = −214.53: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.
In DESI DR1, do quasars at effective z = 1.491 favor the point w₀ = −0.667 and wₐ = −1.09 over the cosmological constant?
Δχ² = −210.46: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.
In DESI DR1, do luminous red galaxies at effective z = 0.51 favor the point w₀ = −0.838 and wₐ = −0.62 over the cosmological constant?
Δχ² = 1.52: the alternative point has a lower χ², but the improvement falls short of the prespecified decision criteria. The result does not establish a preference for the alternative in this fixed-point comparison.
In DESI DR1, do emission-line galaxies at effective z = 1.317 favor the point w₀ = −0.667 and wₐ = −1.09 over the cosmological constant?
Δχ² = −215.07: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.
In DESI DR1, do luminous red galaxies at effective z = 0.919 favor the point w₀ = −0.838 and wₐ = −0.62 over the cosmological constant?
Δχ² = 0.23: the alternative point has a lower χ², but the improvement falls short of the prespecified decision criteria. The result does not establish a preference for the alternative in this fixed-point comparison.
In DESI DR1, do luminous red galaxies at effective z = 0.51 favor the point w₀ = −0.667 and wₐ = −1.09 over the cosmological constant?
Δχ² = −211.71: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.
In DESI DR1, do luminous red galaxies at effective z = 0.706 favor the point w₀ = −0.667 and wₐ = −1.09 over the cosmological constant?
Δχ² = −204.84: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.
In DESI DR1, do emission-line galaxies at effective z = 1.317 favor the point w₀ = −0.838 and wₐ = −0.62 over the cosmological constant?
Δχ² = −1.37: the alternative point has a higher χ² than the reference and fails the prespecified fit-improvement criteria. This conclusion applies to the two points and redshift bin compared; it does not rule out the full family of dynamical dark-energy models.