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2017

Null tests of the standard model using the linear model formalism

Marra, Valerio, Sapone, Domenico

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We test both the FLRW geometry and $\Lambda$CDM cosmology in a model independent way by reconstructing the Hubble function $H(z)$, the comoving distance $D(z)$ and the growth of structure $f\sigma_8(z)$ using the most recent data available.

We use the linear model formalism in order to optimally reconstruct the latter cosmological functions, together with their derivatives and integrals.
We then evaluate four of the null tests available in literature: $Om_{1}$ by Sahni et al., $Om_{2}$ by Zunckel \& Clarkson, $Ok$ by Clarkson et al., and $ns$ by Nesseris \& Sapone.
For all the four tests we find agreement, within the errors, with the standard cosmological model.

Null tests of the standard model using the linear model formalism · Around

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