Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample

By Will J. Percival, B. Reid, Daniel J. Eisenstein, N. Bahcall, Tamás Budavári, Joshua A. Frieman, M. Fukugita, James E. Gunn, Željko Ivezic´, G. Knapp and 18 more. 2009

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The spectroscopic Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) galaxy sample represents the final set of galaxies observed using the original SDSS target selection criteria. We analyse the clustering of galaxies within this sample, including both the luminous red galaxy and main samples, and also include the 2-degree Field Galaxy Redshift Survey data. In total, this sample comprises 893 319 galaxies over 9100 deg(2). Baryon acoustic oscillations (BAO) are observed in power spectra measured for different slices in redshift; this allows us to constrain the distance-redshift relation at multiple epochs. We achieve a distance measure at redshift z = 0.275, of r(s)(z(d))/D-V(0.275) = 0.1390 +/- 0.0037 (2.7 per cent accuracy), where r(s)(z(d)) is the comoving sound horizon at the baryon-drag epoch, D-V(z) equivalent to [(1 + z)(2)D(A)(2)cz/H(z)](1/3), D-A(z) is the angular diameter distance and H(z) is the Hubble parameter. We find an almost independent constraint on the ratio of distances D-V(0.35)/D-V(0.2) = 1.736 +/- 0.065, which is consistent at the 1.1 sigma level with the best-fitting Lambda cold dark matter model obtained when combining our z = 0.275 distance constraint with the Wilkinson Microwave Anisotropy Probe 5-year (WMAP5) data. The offset is similar to that found in previous analyses of the SDSS DR5 sample, but the discrepancy is now of lower significance, a change caused by a revised error analysis and a change in the methodology adopted, as well as the addition of more data. Using WMAP5 constraints on Omega(b)h(2) and Omega(c) h(2), and combining our BAO distance measurements with those from the Union supernova sample, places a tight constraint on Omega(m) = 0.286 +/- 0.018 and H-0 = 68.2 +/- 2.2 km s(-1) Mpc(-1) that is robust to allowing Omega(k) not equal 0 and omega not equal -1. This result is independent of the behaviour of dark energy at redshifts greater than those probed by the BAO and supernova measurements. Combining these data sets with the full WMAP5 likelihood constraints provides tight constraints on both Omega(k) = -0.006 +/- 0.008 and omega = -0.97 +/- 0.10 for a constant dark energy equation of state.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

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Citations in the corpus

GALAXY CLUSTERS SELECTED WITH THE SUNYAEV–ZEL'DOVICH EFFECT FROM 2008 SOUTH POLE TELESCOPE OBSERVATIONS (2010, methodology): “…on parameters: the first two use only the sevenyear data set from the WMAP experiment to explore the standard spatially flat ΛCDM and wCDM cosmologies, while the third explores wCDM while adding data from baryon acoustic oscillations (BAO; Percival et al. 2010) and SNe (Hicken et al. 2009).”
The Observed Growth of Massive Galaxy Clusters I: Statistical Methods and Cosmological Constraints (2009, background): “…et al. 2009; Vikhlinin et al. 2009b) and optically selected (Rozo et al. 2010) cluster samples, and a variety of independent cosmological data (Percival et al. 2007, 2010; A08; Fu et al. 2008; Ho et al. 2008; Kowalski et al. 2008; Hicken et al. 2009; Reid et al. 2010, see also references in…”
THE NINTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPIC DATA FROM THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY (2012, methodology): “The initial SDSS detection of the baryon oscillation feature (Eisenstein et al. 2005; see also Tegmark et al. 2006; Percival et al. 2010; Padmanabhan et al. 2012a) was based upon a galaxy sample at z ∼ 0.35.”
Mock galaxy catalogues using the quick particle mesh method (2013, methodology): “This model has been used to generate mock catalogues for analyses of the 2dF (e.g. Cole et al. 2005), SDSS (most recently, Percival et al. 2010; Reid et al. 2010), WiggleZ (Blake et al. 2011) and 6dF (Beutler et al. 2011, 2012) surveys, among others.”
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A MEASUREMENT OF SECONDARY COSMIC MICROWAVE BACKGROUND ANISOTROPIES WITH TWO YEARS OF SOUTH POLE TELESCOPE OBSERVATIONS (2011, methodology): “All parameter chains include low-redshift measurements of the Hubble constant H0 using the Hubble Space Telescope (Riess et al. 2011) and the BAO feature using SDSS and 2dFGRS data (Percival et al. 2010).”
THE ATACAMA COSMOLOGY TELESCOPE: COSMOLOGICAL PARAMETERS FROM THE 2008 POWER SPECTRUM (2010, methodology): “…ratios, rs/DV (z = 0.2) = 0.1905±0.0061 and rs/DV (z = 0.35) = 0.1097±0.0036, are derived from measurements from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) and the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), using a combined analysis of the two data-sets by Percival et al. (2010).”
Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 (2019, background): “Contact e-mail: victoria.de.sainte.agathe@lpnhe.in2p3.fr Most BAO measurements have employed discrete objects like galaxies (Percival et al. 2010; Reid et al. 2010; Beutler et al. 2011; Blake et al. 2011; Anderson et al. 2012, 2014a,b; Ross et al. 2015; Alam et al. 2017; Bautista et al. 2018) or…”
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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measurements of the growth of structure and expansion rate at z = 0.57 from anisotropic clustering (2012, methodology): “…et al. 2011) and baryon acoustic oscillations (BAO; Cole et al. 2005; Eisenstein et al. 2005; Hütsi 2006; Blake et al. 2007; Padmanabhan et al. 2007; Percival et al. 2007, 2010; Okumura et al. 2008; Gaztanaga, Cabre & Hui 2009; Kazin et al. 2010; Reid et al. 2010b; Beutler et al. 2011; Blake et…”
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Delensing CMB polarization with external datasets (2010, neutral): “[1, 2, 3, 4, 5]) to an impressive level of precision.”