Model-independent cosmographic constraints from DESI 2024

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Volume 690 (October 2024)

A&A, 690 (2024) A40

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Table 1

Theoretical cosmographic coefficients.

Model	Ω_m	w or w₀	w_a	Bounds	q₀	j₀	s₀
ΛCDM	0.310 ± 0.007	−1	–	Planck	−0.535 ± 0.011	1	−0.395 ± 0.033
	0.307 ± 0.005	−1	–	DESI	−0.540 ± 0.008	1	−0.381 ± 0.023

wCDM	0.310 ± 0.007	−0.960 ± 0.080	–	Planck	−0.494 ± 0.093	0.881 ± 0.230	−0.564 ± 0.230
	0.317 ± 0.007	−0.967 ± 0.024	–	DESI	−0.491 ± 0.034	0.902 ± 0.070	−0.566 ± 0.070

CPL	0.310 ± 0.007	−0.957 ± 0.080	$- {0.290}_{- 0.260}^{+ 0.320}$ $- 0.290_{ - 0.260}^{ + 0.320}$	Planck	−0.490 ± 0.093	${0.572}_{- 0.501}^{+ 0.563}$ $0.572_{ - 0.501}^{ + 0.563}$	$- {1.806}_{- 1.166}^{+ 1.421}$ $- 1.806_{ - 1.166}^{ + 1.421}$
	0.316 ± 0.007	−0.727 ± 0.067	$- {1.050}_{- 0.270}^{+ 0.310}$ $- 1.050_{ - 0.270}^{ + 0.310}$	DESI	−0.246 ± 0.076	$- {0.688}_{- 0.387}^{+ 0.428}$ $- 0.688_{ - 0.387}^{ + 0.428}$	$- {2.839}_{- 1.237}^{+ 1.311}$ $- 2.839_{ - 1.237}^{ + 1.311}$

Notes. Values of the cosmographic coefficients inferred from the theoretical cosmographic sets for each model, namely Eqs. (6), (8), and (11). Here, we used experimental values from Planck Collaboration VI (2020) and DESI Collaboration (2024), as reported above. The corresponding error bars were computed through a logarithmic error propagation.

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