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

By F. Beutler, C. Blake, M. Colless, D. Jones, L. Staveley-Smith, L. Campbell, Quentin A. Parker, Will J. Saunders, F. Watson. 2011

2,305 citations recorded by the source corpus.

We analyse the large-scale correlation function of the 6dF Galaxy Survey (6dFGS) and detect a baryon acoustic oscillation (BAO) signal at 105h −1 Mpc. The 6dFGS BAO detection allows us to constrain the distance–redshift relation at zeff = 0.106. We achieve a distance measure of DV (zeff) = 457 ± 27 Mpc and a measurement of the distance ratio, rs(zd)/DV (zeff) = 0.336 ± 0.015 (4.5 per cent precision), where rs(zd) is the sound horizon at the drag epoch zd .T he 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 H0 = 67 ± 3.2 km s −1 Mpc −1 (4.8 per cent precision) that depends only on theWilkinson Microwave Anisotropy Probe-7 (WMAP-7) calibration of the sound horizon and on the galaxy clustering in 6dFGS. Compared to earlier BAO studies at higher redshift, our analysis is less dependent on other cosmological parameters. The sensitivity to H0 can be used to break the degeneracy between the dark energy equation of state parameter w and H0 in the cosmic microwave background data. We determine that w =− 0.97 ± 0.13, using only WMAP-7 and BAO data from both 6dFGS and Percival et al. (2010). We also discuss predictions for the large-scale correlation function of two future wide-angle surveys: the Wide field ASKAP L-band Legacy All-sky Blind surveY (WALLABY) blind H I survey (with the Australian Square Kilometre Array Pathfinder, ASKAP) and the proposed Transforming Astronomical Imaging surveys through Polychromatic Analysis of Nebulae (TAIPAN) all-southern-sky optical galaxy survey with the UK Schmidt Telescope. We find that both surveys are very likely to yield detections of the BAO peak, making WALLABY the first radio galaxy survey to do so. We also predict that TAIPAN has the potential to constrain the Hubble constant with 3 per cent precision.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/067027e27b21a586b95f529aed7a56caf8b13cb8

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Citations in the corpus

Cosmology Intertwined II: The Hubble Constant Tension (2020, neutral): “[6] F.”
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Structure formation in f(T) gravity and a solution for H0 tension (2018, methodology): “BAO: The baryon acoustic oscillations (BAO) measurements from the Six Degree Field Galaxy Survey (6dF) [74], the Main Galaxy Sample of Data Release 7 of Sloan Digital Sky Survey (SDSS-MGS) [75], the LOWZ and CMASS galaxy samples of the Baryon Oscillation Spectroscopic Survey (BOSS-LOWZ and BOSS-CMAS”
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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the BOSS Final Data Release (2015, background): “…of large surveys (Percival et al. 2001; Cole et al. 2005) was done based on lognormal realizations (see also Percival, Verde & Peacock 2004; Beutler et al. 2011), which match the two-point statistics by construction (Coles & Jones 1991), although their three-point statistics is very…”
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Planck2018 results (2018, methodology): “For our BAO data compilation, we use the measurements of DV/rd from the 6dF survey at an effective redshift zeff = 0.106 (Beutler et al. 2011), and the SDSS Main Galaxy Sample at zeff = 0.15 (Ross et al. 2015), plus the final interpreta- tion of the SDSS III DR12 data (Alam et al. 2016), with…”
Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data (2018, methodology): “The BAO dataset includes the measurements of angular diameter distances from the 6dF Galaxy Survey (Beutler et al. 2011), the SDSS DR7 Main Galaxy Sample (Ross et al. 2015), and BOSS LOWZ and CMASS DR12 sample (Alam et al. 2017).”