The clustering of the SDSS DR7 Main Galaxy Sample I: a 4 per cent distance measure at z=0.15

By A. Ross, L. Samushia, Cullan Howlett, Will J. Percival, A. Burden, Marc Manera. 2014

1,579 citations recorded by the source corpus.

We create a sample of spectroscopically identified galaxies with z < 0.2 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7), covering 6813 deg(2). Galaxies are chosen to sample the highest mass haloes, with an effective bias of 1.5, allowing us to construct 1000 mock galaxy catalogues (described in Paper II), which we use to estimate statistical errors and test our methods. We use an estimate of the gravitational potential to 'reconstruct' the linear density fluctuations, enhancing the baryon acoustic oscillation (BAO) signal in the measured correlation function and power spectrum. Fitting to these measurements, we determine D-V(z(eff) = 0.15) = (664 +/- 25)(r(d)/r(d, fid)) Mpc; this is a better than 4 per cent distance measurement. This 'fills the gap' in BAO distance ladder between previously measured local and higher redshift measurements, and affords significant improvement in constraining the properties of dark energy. Combining our measurement with other BAO measurements from Baryon Oscillation Spectroscopic Survey and 6-degree Field Galaxy Redshift Survey galaxy samples provides a 15 per cent improvement in the determination of the equation of state of dark energy and the value of the Hubble parameter at z = 0 (H-0). Our measurement is fully consistent with the Planck results and the Lambda cold dark matter concordance cosmology, but increases the tension between Planck+BAO H-0 determinations and direct H-0 measurements.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/3731657c52a0077404f9900c21e2195d646087d7

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Statistical and Nonlinear Physics

Citations in the corpus

Interacting dark energy with time varying equation of state and the H0 tension (2018, background): “• Baryon acoustic oscillations (BAO) distance measurements [58, 59, 60].”
Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions (2018, background): “15 [41], as well as the recent DES1 BAO measurement at z = 0.”
Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 (2019, background): “…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 quasars (Ata et al. 2018; Gil-Marín et al. 2018; Hou et al. 2018; Zarrouk et al. 2018).”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, background): “It successfully predicts key aspects of the observed large-scale structure, from baryonic acoustic oscillations (e.g. Anderson et al. 2014; Kazin et al. 2014; Ross et al. 2015) on the largest scales down to Mpc-scale galaxy clustering and associated inflow velocities (e.g. Peacock et al. 2001).”
Tale of stable interacting dark energy, observational signatures, and the H0 tension (2018, background): “15) [109], (iii) the CMASS sample of Data Release 12 (DR12) of the Baryon Oscillation Spectroscopic Survey (BOSS) (zeff = 0.”
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample (2017, methodology): “…from Planck Collaboration et al. (2016a), measurements of the local value of H0 from Riess et al. (2016), and measurements of baryon acoustic oscillations from the SDSS Main Galaxy Sample (Ross et al. 2015), the Baryon Oscillation Spectroscopic Survey, and the CMASS survey (Anderson et al. 2014).”
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”
Flavor structures of charged fermions and massive neutrinos (2019, neutral): “The final full-mission Planck measurements of the CMB anisotropies [87], combined with the BAO measurements [335, 336, 337], strongly support the”