An accurate determination of the Hubble constant from Baryon Acoustic Oscillation datasets

Abstract

Even though the Hubble constant cannot be significantly determined by the low-redshift Baryon Acoustic Oscillation (BAO) data alone, it can be tightly constrained once the high-redshift BAO data are combined. Combining BAO data from 6dFGS, BOSS DR11 clustering of galaxies, WiggleZ and $z=2.34$ from BOSS DR11 quasar Lyman-$\alpha$ forest lines, we get $H_0=68.17_{-1.56}^{+1.55}$ km s${}^{-1}$ Mpc${}^{-1}$. In addition, adopting the the simultaneous measurements of $H(z)$ and $D_A(z)$ from the two-dimensional two-point correlation function from BOSS DR9 CMASS sample and two-dimensional matter power spectrum from SDSS DR7 sample, we obtain $H_0=68.11\pm 1.69$ km s${}^{-1}$ Mpc${}^{-1}$. Finally, combining all of the BAO datasets, we conclude $H_0=68.11\pm 0.86$ km s${}^{-1}$ Mpc${}^{-1}$, a 1.3% determination.

arXiv comment13 pages, 5 figures, 2 tables

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