The 6dF Galaxy Survey: baryon acoustic oscillations and the local Hubble constant

We analyse the large-scale correlation function of the 6dF Galaxy Survey (6dFGS) and detect a baryon acoustic oscillation (BAO) signal at 105 h -1 Mpc. The 6dFGS BAO detection allows us to constrain the distance-redshift relation at z eff = 0.106. We achieve a distance measure of D V (z eff ) = 457 27 Mpc and a measurement of the distance ratio, r s (z d )/D V (z eff ) = 0.336 0.015 (4.5 per cent precision), where r s (z d ) is the sound horizon at the drag epoch z d . The loweffective redshift of 6dFGS makes it a competitive and independent alternative to Cepheids and low-z supernovae in constraining the Hubble constant. We find a Hubble constant of H 0 = 67 3.2 km s -1 Mpc -1 (4.8 per cent precision) that…

• AG
  Australian Government
• AN
  Australian National University