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Article overview
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Null test of the cosmic curvature using $H(z)$ and supernovae data | Rong-Gen Cai
; Zong-Kuan Guo
; Tao Yang
; | Date: |
21 Sep 2015 | Abstract: | 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 $1sigma$ limit. To demonstrate the effect on the
precision of the null test, we produce a series of simulated data of the models
with different $Omega_K^{(0)}$. Future observations in better quality can
provide a greater improvement to constrain or refute the flat universe with
$Omega_K^{(0)}=0$. | Source: | arXiv, 1509.6283 | Services: | Forum | Review | PDF | Favorites |
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