Constraints on H 0 from WMAP and BAO Measurements
Abstract
We report the constraints of H0 obtained from Wilkinson Microwave Anisotropy Probe (WMAP) 9-year data combined with the latest baryonic acoustic oscillations (BAO) measurements. We use the BAO measurements from 6dF Galaxy Survey (6dFGS), the SDSS DR7 main galaxies sample (MGS), the BOSS DR12 galaxies, and the eBOSS DR14 quasars. Adding the recent BAO measurements to the cosmic microwave background (CMB) data from WMAP, we constrain cosmological parameters Ωm = 0.298 ± 0.005, {H}_{0}={68.36}_{-0.52}(+0.53}{km) * {{s}}(-1) * {{Mpc}}(-1) H0=68.36-0.52+0.53kmṡs-1ṡMpc-1 , {sigma }_{8}={0.8170}_{-0.0175}(+0.0159) σ8=0.8170-0.0175+0.0159 in a spatially flat Λ cold dark matter (ΛCDM) model, and Ωm = 0.302 ± 0.008, H0 = 67.63 ± 1.30 km ṡ s-1 ṡ Mpc-1, {sigma }_{8}={0.7988}_{-0.0338}(+0.0345) σ8=0.7988-0.0338+0.0345 in a spatially flat wCDM model, respectively. Our measured H0 results prefer a value lower than 70 km ṡ s-1 ṡ Mpc-1, consistent with the recent data on CMB constraints from Planck (2018), but in 3.1 and 3.5σ tension with local measurements of SH0ES (2018) in ΛCDM and wCDM framework, respectively. Our results indicate that there is a systematic tension on the Hubble constant between SH0ES and the combination of CMB and BAO datasets.
- Publication:
-
Communications in Theoretical Physics
- Pub Date:
- July 2019
- DOI:
- 10.1088/0253-6102/71/7/826
- Bibcode:
- 2019CoTPh..71..826Z
- Keywords:
-
- Hubble constant;
- cosmic microwave background;
- baryon acoustic oscillation