Cosmological Constraints from Hubble parameter $H(z)$ and SN Ia observations

Understand

In this paper, we use a set of observational $H(z)$ data (OHD) to constrain the $\Lambda$CDM cosmology.

• This data set can be derived from the differential ages of the passively evolving galaxies.
• Meanwhile, the $\mathcal {A}$-parameter, which describes the Baryonic Acoustic Oscillation (BAO) peak, and the newly measured value of the Cosmic Microwave Background (CMB) shift parameter $\mathcal {R}$ are used to present combinational constraints on the same cosmology.
• The combinational constraints favor an accelerating flat universe while the flat $\Lambda$CDM cosmology is also analyzed in the same way.