The clustering of galaxies in the SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: constraints on primordial non-Gaussianity

By A. Ross, Will J. Percival, A. Carnero, Gong-Bo Zhao, Marc Manera, A. Raccanelli, E. Aubourg, D. Bizyaev, H. Brewington, J. Brinkmann and 29 more. 2012

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We analyse the density field of 264 283 galaxies observed by the Sloan Digital Sky Surve (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS) and included in the SDSS Data Release 9 (DR9). In total, the SDSS DR9 BOSS data include spectroscopic redshifts for over 400 000 galaxies spread over a footprint of more than 3000 deg^2. We measure the power spectrum of these galaxies with redshifts 0.43 0), is 99.5 per cent. After quantifying and correcting for the systematic bias and including the added uncertainty, we find −45 0) = 91.0 per cent. A more conservative approach assumes that we have only learnt the k dependence of the systematic bias and allows any amplitude for the systematic correction; we find that the systematic effect is not fully degenerate with that of f^(local)_(NL) , and we determine that −82 0) = 68 per cent. This analysis demonstrates the importance of accounting for the impact of Galactic foregrounds on f^(local)_(NL) measurements. We outline the methods that account for these systematic biases and uncertainties. We expect our methods to yield robust constraints on f^(local)_(NL) for both our own and future large-scale structure investigations.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/b1a7d0c94fd1707cfad08a98cdafb1a1e127039d

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Citations in the corpus

The clustering of Galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: including covariance matrix errors (2013, methodology): “We have changed the fitting method from that in Anderson et al. (2012) in two key ways: (i) we fit band-powers inlogP (k), which was shown to be close to having a multi-variate Gaussian distribution in Ross et al. (2013a), as expected in the sample-variance limited regime.”
Probing primordial non-Gaussianity with SKA galaxy redshift surveys: a fully relativistic analysis (2014, background): “Galaxy surveys currently lag well behind Planck, but they can provide a valuable consistency check by probing PNG at low redshifts (see e.g. Ross et al. 2013; Giannantonio et al. 2014, for the current level of constraints on fNL).”
The power spectrum and bispectrum of SDSS DR11 BOSS galaxies – I. Bias and gravity (2014, methodology): “…by U niversity of Portsm outh Library user on 27 O ctober 2020 In order to correct several shortcomings of the CMASS data set (Ross et al. 2013; Anderson et al. 2014), three different incompleteness weights have been included; a redshift failure weight, wrf, a fibre…”
SDSS-III Baryon Oscillation Spectroscopic Survey Data Release 12: galaxy target selection and large-scale structure catalogues (2015, background): “Primordial non-Gaussianity was constrained by Ross et al. (2013), while Zhao et al. (2013) reported neutrino masses, and Scoccola et al. (2013) examined the time variation of physical constants.”
THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATA (2015, methodology): “The sample can be used to enhance BOSS constraints on the luminosity function (e.g. Ross et al. 2013b; McGreer et al. 2013), provide halo occupation statistics that can be used to constrain eBOSS 37 the duty cycle of quasars as a function of halo mass and quasar luminosity, and to explore the…”
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: observational systematics and baryon acoustic oscillations in the correlation function (2016, background): “However, each individual analysis will be affected differently, and it would therefore be prudent for any future studies of the clustering of BOSS galaxies (e.g., primordial nonGaussianity; Ross et al. 2013) at the largest scales to reconsider this choice.”