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2015

Null test of the cosmic curvature using $H(z)$ and supernovae data

Cai, Rong-Gen, Guo, Zong-Kuan, Yang, Tao

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We introduce a model-independent approach to the null test of the cosmic curvature which is geometrically related to the Hubble parameter $H(z)$ and luminosity distance $d_L(z)$.

Combining the independent observations of $H(z)$ and $d_L(z)$, we use the model-independent smoothing technique, Gaussian processes, to reconstruct them and determine the cosmic curvature $\Omega_K^{(0)}$ in the null test relation.
The null test is totally geometrical and without assuming any cosmological model.
We show that the cosmic curvature $\Omega_K^{(0)}=0$ is consistent with current observational data sets, falling within the $1\sigma$ limit.

Null test of the cosmic curvature using $H(z)$ and supernovae data · Around

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