摘要: The cosmic curvature $\Omega_{K,0}$, which determines the spatial geometry of
the universe, is an important parameter in modern cosmology. Any deviation from
$\Omega_{K,0}=0$ would have a profound impact on primordial inflation paradigm
and fundamental physics. In this work, we adopt a cosmological
model-independent method to test whether $\Omega_{K,0}$ deviates from zero. We
use the Gaussian process to reconstruct the reduced Hubble parameter $E(z)$ and
the derivative of distance $D'(z)$ from observational data, and then determine
$\Omega_{K,0}$ with a null test relation. The cosmic chronometer (CC) Hubble
data, baryon acoustic oscillation (BAO) Hubble data, and supernovae Pantheon
sample are considered. Our result is consistent with a spatially flat universe
within the domain of reconstruction $0
1$, it tends to favor a closed universe. In this sense, there is
still a possibility for a closed universe. We also carry out the null test of
the cosmic curvature at $0
相关信息
待评议
点击量
下载量
