Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints

Samuel R. Hinton; Eyal Kazin; Tamara M. Davis; Chris Blake; Sarah Brough; Matthew Colless; Warrick J. Couch; Michael J. Drinkwater; Karl Glazebrook; Russell J. Jurek; David Parkinson; Kevin A. Pimbblet; Gregory B. Poole; Michael Pracy; David Woods

doi:10.1093/mnras/stw2725

Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints

Samuel R. Hinton^*, Eyal Kazin, Tamara M. Davis, Chris Blake, Sarah Brough, Matthew Colless, Warrick J. Couch, Michael J. Drinkwater, Karl Glazebrook, Russell J. Jurek, David Parkinson, Kevin A. Pimbblet, Gregory B. Poole, Michael Pracy, David Woods

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation function and secondly focusing only on the position of the BAO peak in the reconstructed data set. When fitting for the full shape of the 2D correlation function we use a multipole expansion to compare with theory. When we use the reconstructed data we marginalize over the shape and just measure the position of the BAO peak, analysing the data in wedges separating the signal along the line of sight from that parallel to the line of sight. We verify our method with mock data and find the results to be free of bias or systematic offsets. We also redo the pre-reconstruction angle-averaged (1D) WiggleZ BAO analysis with an improved covariance and present an updated result. The final results are presented in the form of Ω_c h², H(z), and D_A(z) for three redshift bins with effective redshifts z=0.44, 0.60, and 0.73.Within these bins and methodologies, we recover constraints between 5 and 22 per cent error. Our cosmological constraints are consistent with flat ΛCDM cosmology and agree with results from the Baryon Oscillation Spectroscopic Survey.

Original language	English
Pages (from-to)	4807-4822
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	464
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stw2725
Publication status	Published - 1 Feb 2017

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Hinton, S. R., Kazin, E., Davis, T. M., Blake, C., Brough, S., Colless, M., Couch, W. J., Drinkwater, M. J., Glazebrook, K., Jurek, R. J., Parkinson, D., Pimbblet, K. A., Poole, G. B., Pracy, M., & Woods, D. (2017). Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints. Monthly Notices of the Royal Astronomical Society, 464(4), 4807-4822. https://doi.org/10.1093/mnras/stw2725

@article{31fbee92611041ac8c7178a1d4ff32f7,

title = "Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints",

abstract = "We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation function and secondly focusing only on the position of the BAO peak in the reconstructed data set. When fitting for the full shape of the 2D correlation function we use a multipole expansion to compare with theory. When we use the reconstructed data we marginalize over the shape and just measure the position of the BAO peak, analysing the data in wedges separating the signal along the line of sight from that parallel to the line of sight. We verify our method with mock data and find the results to be free of bias or systematic offsets. We also redo the pre-reconstruction angle-averaged (1D) WiggleZ BAO analysis with an improved covariance and present an updated result. The final results are presented in the form of Ωc h2, H(z), and DA(z) for three redshift bins with effective redshifts z=0.44, 0.60, and 0.73.Within these bins and methodologies, we recover constraints between 5 and 22 per cent error. Our cosmological constraints are consistent with flat ΛCDM cosmology and agree with results from the Baryon Oscillation Spectroscopic Survey.",

keywords = "Cosmological parameters, Dark energy, Large-scale structure of Universe",

author = "Hinton, {Samuel R.} and Eyal Kazin and Davis, {Tamara M.} and Chris Blake and Sarah Brough and Matthew Colless and Couch, {Warrick J.} and Drinkwater, {Michael J.} and Karl Glazebrook and Jurek, {Russell J.} and David Parkinson and Pimbblet, {Kevin A.} and Poole, {Gregory B.} and Michael Pracy and David Woods",

note = "Publisher Copyright: {\textcopyright} 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2017",

month = feb,

day = "1",

doi = "10.1093/mnras/stw2725",

language = "English",

volume = "464",

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Hinton, SR, Kazin, E, Davis, TM, Blake, C, Brough, S, Colless, M, Couch, WJ, Drinkwater, MJ, Glazebrook, K, Jurek, RJ, Parkinson, D, Pimbblet, KA, Poole, GB, Pracy, M & Woods, D 2017, 'Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 4, pp. 4807-4822. https://doi.org/10.1093/mnras/stw2725

TY - JOUR

T1 - Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ

T2 - Cosmological constraints

AU - Hinton, Samuel R.

AU - Kazin, Eyal

AU - Davis, Tamara M.

AU - Blake, Chris

AU - Brough, Sarah

AU - Colless, Matthew

AU - Couch, Warrick J.

AU - Drinkwater, Michael J.

AU - Glazebrook, Karl

AU - Jurek, Russell J.

AU - Parkinson, David

AU - Pimbblet, Kevin A.

AU - Poole, Gregory B.

AU - Pracy, Michael

AU - Woods, David

PY - 2017/2/1

Y1 - 2017/2/1

N2 - We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation function and secondly focusing only on the position of the BAO peak in the reconstructed data set. When fitting for the full shape of the 2D correlation function we use a multipole expansion to compare with theory. When we use the reconstructed data we marginalize over the shape and just measure the position of the BAO peak, analysing the data in wedges separating the signal along the line of sight from that parallel to the line of sight. We verify our method with mock data and find the results to be free of bias or systematic offsets. We also redo the pre-reconstruction angle-averaged (1D) WiggleZ BAO analysis with an improved covariance and present an updated result. The final results are presented in the form of Ωc h2, H(z), and DA(z) for three redshift bins with effective redshifts z=0.44, 0.60, and 0.73.Within these bins and methodologies, we recover constraints between 5 and 22 per cent error. Our cosmological constraints are consistent with flat ΛCDM cosmology and agree with results from the Baryon Oscillation Spectroscopic Survey.

AB - We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation function and secondly focusing only on the position of the BAO peak in the reconstructed data set. When fitting for the full shape of the 2D correlation function we use a multipole expansion to compare with theory. When we use the reconstructed data we marginalize over the shape and just measure the position of the BAO peak, analysing the data in wedges separating the signal along the line of sight from that parallel to the line of sight. We verify our method with mock data and find the results to be free of bias or systematic offsets. We also redo the pre-reconstruction angle-averaged (1D) WiggleZ BAO analysis with an improved covariance and present an updated result. The final results are presented in the form of Ωc h2, H(z), and DA(z) for three redshift bins with effective redshifts z=0.44, 0.60, and 0.73.Within these bins and methodologies, we recover constraints between 5 and 22 per cent error. Our cosmological constraints are consistent with flat ΛCDM cosmology and agree with results from the Baryon Oscillation Spectroscopic Survey.

KW - Cosmological parameters

KW - Dark energy

KW - Large-scale structure of Universe

UR - http://www.scopus.com/inward/record.url?scp=85014826843&partnerID=8YFLogxK

U2 - 10.1093/mnras/stw2725

DO - 10.1093/mnras/stw2725

M3 - Article

SN - 0035-8711

VL - 464

SP - 4807

EP - 4822

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: Cosmological constraints

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