Hubble tension and small-scale inhomogeneities on light propagation

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Table 1.

Parameterisations of the smoothness parameter, α.

Parameterisation	α(z)
mZKDR	α^(a)
mZKDR1	α₀ + α₁z^(b)
mZKDR2	$\frac{β_{0} {(1 + z)}^{3 γ}}{1 + β_{0} {(1 + z)}^{3 γ}}$ $Mathematical equation: $ \frac{\beta_0(1+z)^{3\gamma}}{1+\beta_0(1+z)^{3\gamma}} $$ ^(c)

Notes. The first column indicates the label for each parameterisation as reported in Sect. 4.

^(a)

Parameterisation from Kalomenopoulos et al. (2021).

^(b)

Parameterisation from Linder (1988).

^(c)

Parameterisation from Santos & Lima (2006).

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