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Updated reduced CMB data and constraints on cosmological parameters

We obtain the reduced CMB data $\{l_A, R, z_*\}$ from WMAP9, WMAP9+BICEP2, Planck+WP and Planck+WP+BICEP2 for the $Λ$CDM and $w$CDM models with or without spatial curvature. We then use these reduced CMB data in combination with low-redshift observations to put constraints on cosmological parameters. We find that including BICEP2 results in a higher value of the Hubble constant especially when the equation of state of dark energy and curvature are allowed to vary. For the $Λ$CDM model with curvature, the estimate of the Hubble constant with Planck+WP+Lensing is inconsistent with the one derived from Planck+WP+BICEP at about 1.3 $σ$ confidence level.

preprint2015arXivOpen access
Rong-Gen CaiZong-Kuan GuoBo Tang
astro-ph.COgr-qc
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Rong-Gen CaiZong-Kuan GuoBo Tang

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