Low redshift measurements of Baryon Acoustic Oscillations ( BAO ) test the late time evolution of the Universe and are a vital probe of Dark Energy .
Over the past decade both the 6-degree Field Galaxy Survey ( 6dFGS ) and Sloan Digital Sky Survey ( SDSS ) have provided important distance constraints at z < 0.3 .
In this paper we re-evaluate the cosmological information from the BAO detection in 6dFGS making use of HOD populated COLA mocks for a robust covariance matrix and taking advantage of the now commonly implemented technique of density field reconstruction .
For the 6dFGS data , we find consistency with the previous analysis , and obtain an isotropic volume averaged distance measurement of D _ { V } ( z _ { \mathrm { eff } } = 0.097 ) = 372 \pm 17 ( r _ { s } / r _ { s } ^ { \mathrm { fid } } ) \mathrm { Mpc } , which has a non-Gaussian likelihood outside the 1 \sigma region .
We combine our measurement from both the post-reconstruction clustering of 6dFGS and SDSS MGS offering the most robust constraint to date in this redshift regime , D _ { V } ( z _ { \mathrm { eff } } = 0.122 ) = 539 \pm 17 ( r _ { s } / r ^ { \mathrm { fid } } _ { s } ) \mathrm { Mpc } .
These measurements are consistent with standard \Lambda \mathrm { CDM } and after fixing the standard ruler using a Planck prior on \Omega _ { m } h ^ { 2 } , the joint analysis gives H _ { 0 } = 64.0 \pm 3.5 \mathrm { kms } ^ { -1 } \mathrm { Mpc } ^ { -1 } .
In the near future both the Taipan Galaxy Survey and the Dark Energy Spectroscopic Instrument ( DESI ) will improve this measurement to 1 \% at low redshift .