Abstract
AbstractThe statefinder diagnostic is useful to discriminate dark energy models. In this paper, under the minimum assumption of a spatially flat Friedmann–Lemaître–Robertson–Walker Universe, we reconstruct the statefinder pair $$\{r(z),s(z)\}$$
{
r
(
z
)
,
s
(
z
)
}
in addition to the deceleration parameter q(z) via the Gaussian process from the cosmic observational data points which include the recently released Pantheon+ SN Ia samples and the observational Hubble data H(z). The reconstructed evolution trajectories are shown on the $$r-q$$
r
-
q
, $$r-s$$
r
-
s
planes. The reconstructed q(z) is consistent with previous studies. Meanwhile, a novel quantity named suitability is introduced on the $$r-q$$
r
-
q
, $$r-s$$
r
-
s
planes to assess the validation of a dark energy model.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
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