The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations

Chris Blake; Eyal Kazin; Florian Beutler; Tamara Davis; David Parkinson; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Scott Croom; Darren Croton; Michael J. Drinkwater; Karl Forster; David Gilbank; Mike Gladders; Karl Glazebrook; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; Chris Martin; Kevin Pimbblet; Gregory Poole; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted Wyder; Howard Yee

doi:10.1111/j.1365-2966.2011.19592.x

The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations

Chris Blake, Eyal Kazin, Florian Beutler, Tamara Davis, David Parkinson, Sarah Brough, Matthew Colless, Carlos Contreras, Warrick Couch, Scott Croom, Darren Croton, Michael J. Drinkwater, Karl Forster, David Gilbank, Mike Gladders, Karl Glazebrook, Ben Jelliffe, Russell J. Jurek, I-hui Li, Barry MadoreChris Martin, Kevin Pimbblet, Gregory Poole, Michael Pracy, Rob Sharp, Emily Wisnioski, David Woods, Ted Wyder, Howard Yee

Institute of Cosmology & Gravitation

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

Abstract

We present measurements of the baryon acoustic peak at redshifts z = 0.44, 0.6 and 0.73 in the galaxy correlation function of the final dataset of the WiggleZ Dark Energy Survey. We combine our correlation function with lower-redshift measurements from the 6-degree Field Galaxy Survey and Sloan Digital Sky Survey, producing a stacked survey correlation function in which the statistical significance of the detection of the baryon acoustic peak is 4.9-sigma relative to a zero-baryon model with no peak. We fit cosmological models to this combined baryon acoustic oscillation (BAO) dataset comprising six distance-redshift data points, and compare the results to similar fits to the latest compilation of supernovae (SNe) and Cosmic Microwave Background (CMB) data. The BAO and SNe datasets produce consistent measurements of the equation-of-state w of dark energy, when separately combined with the CMB, providing a powerful check for systematic errors in either of these distance probes. Combining all datasets we determine w = -1.03 +/- 0.08 for a flat Universe, consistent with a cosmological constant model. Assuming dark energy is a cosmological constant and varying the spatial curvature, we find Omega_k = -0.004 +/- 0.006.

Original language	English
Pages (from-to)	1707-1724
Number of pages	18
Journal	Monthly Notices of the Royal Astronomical Society
Volume	418
Issue number	3
Early online date	6 Dec 2011
DOIs	https://doi.org/10.1111/j.1365-2966.2011.19592.x
Publication status	Published - 11 Dec 2011

Keywords

astro-ph.CO
surveys
cosmological parameters
distance scale
large-scale structure of Universe

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10.1111/j.1365-2966.2011.19592.x

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Blake, C., Kazin, E., Beutler, F., Davis, T., Parkinson, D., Brough, S., Colless, M., Contreras, C., Couch, W., Croom, S., Croton, D., Drinkwater, M. J., Forster, K., Gilbank, D., Gladders, M., Glazebrook, K., Jelliffe, B., Jurek, R. J., Li, I., ... Yee, H. (2011). The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations. Monthly Notices of the Royal Astronomical Society, 418(3), 1707-1724. https://doi.org/10.1111/j.1365-2966.2011.19592.x

@article{385318c6b7ae4d55a42d70273e76c42c,

title = "The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations",

abstract = "We present measurements of the baryon acoustic peak at redshifts z = 0.44, 0.6 and 0.73 in the galaxy correlation function of the final dataset of the WiggleZ Dark Energy Survey. We combine our correlation function with lower-redshift measurements from the 6-degree Field Galaxy Survey and Sloan Digital Sky Survey, producing a stacked survey correlation function in which the statistical significance of the detection of the baryon acoustic peak is 4.9-sigma relative to a zero-baryon model with no peak. We fit cosmological models to this combined baryon acoustic oscillation (BAO) dataset comprising six distance-redshift data points, and compare the results to similar fits to the latest compilation of supernovae (SNe) and Cosmic Microwave Background (CMB) data. The BAO and SNe datasets produce consistent measurements of the equation-of-state w of dark energy, when separately combined with the CMB, providing a powerful check for systematic errors in either of these distance probes. Combining all datasets we determine w = -1.03 +/- 0.08 for a flat Universe, consistent with a cosmological constant model. Assuming dark energy is a cosmological constant and varying the spatial curvature, we find Omega_k = -0.004 +/- 0.006.",

keywords = "astro-ph.CO, surveys, cosmological parameters, distance scale, large-scale structure of Universe",

author = "Chris Blake and Eyal Kazin and Florian Beutler and Tamara Davis and David Parkinson and Sarah Brough and Matthew Colless and Carlos Contreras and Warrick Couch and Scott Croom and Darren Croton and Drinkwater, {Michael J.} and Karl Forster and David Gilbank and Mike Gladders and Karl Glazebrook and Ben Jelliffe and Jurek, {Russell J.} and I-hui Li and Barry Madore and Chris Martin and Kevin Pimbblet and Gregory Poole and Michael Pracy and Rob Sharp and Emily Wisnioski and David Woods and Ted Wyder and Howard Yee",

note = "20 pages, 18 figures, accepted for publication by MNRAS",

year = "2011",

month = dec,

day = "11",

doi = "10.1111/j.1365-2966.2011.19592.x",

language = "English",

volume = "418",

pages = "1707--1724",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Blake, C, Kazin, E, Beutler, F, Davis, T, Parkinson, D, Brough, S, Colless, M, Contreras, C, Couch, W, Croom, S, Croton, D, Drinkwater, MJ, Forster, K, Gilbank, D, Gladders, M, Glazebrook, K, Jelliffe, B, Jurek, RJ, Li, I, Madore, B, Martin, C, Pimbblet, K, Poole, G, Pracy, M, Sharp, R, Wisnioski, E, Woods, D, Wyder, T & Yee, H 2011, 'The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations', Monthly Notices of the Royal Astronomical Society, vol. 418, no. 3, pp. 1707-1724. https://doi.org/10.1111/j.1365-2966.2011.19592.x

TY - JOUR

T1 - The WiggleZ Dark Energy Survey

T2 - mapping the distance-redshift relation with baryon acoustic oscillations

AU - Blake, Chris

AU - Kazin, Eyal

AU - Beutler, Florian

AU - Davis, Tamara

AU - Parkinson, David

AU - Brough, Sarah

AU - Colless, Matthew

AU - Contreras, Carlos

AU - Couch, Warrick

AU - Croom, Scott

AU - Croton, Darren

AU - Drinkwater, Michael J.

AU - Forster, Karl

AU - Gilbank, David

AU - Gladders, Mike

AU - Glazebrook, Karl

AU - Jelliffe, Ben

AU - Jurek, Russell J.

AU - Li, I-hui

AU - Madore, Barry

AU - Martin, Chris

AU - Pimbblet, Kevin

AU - Poole, Gregory

AU - Pracy, Michael

AU - Sharp, Rob

AU - Wisnioski, Emily

AU - Woods, David

AU - Wyder, Ted

AU - Yee, Howard

N1 - 20 pages, 18 figures, accepted for publication by MNRAS

PY - 2011/12/11

Y1 - 2011/12/11

N2 - We present measurements of the baryon acoustic peak at redshifts z = 0.44, 0.6 and 0.73 in the galaxy correlation function of the final dataset of the WiggleZ Dark Energy Survey. We combine our correlation function with lower-redshift measurements from the 6-degree Field Galaxy Survey and Sloan Digital Sky Survey, producing a stacked survey correlation function in which the statistical significance of the detection of the baryon acoustic peak is 4.9-sigma relative to a zero-baryon model with no peak. We fit cosmological models to this combined baryon acoustic oscillation (BAO) dataset comprising six distance-redshift data points, and compare the results to similar fits to the latest compilation of supernovae (SNe) and Cosmic Microwave Background (CMB) data. The BAO and SNe datasets produce consistent measurements of the equation-of-state w of dark energy, when separately combined with the CMB, providing a powerful check for systematic errors in either of these distance probes. Combining all datasets we determine w = -1.03 +/- 0.08 for a flat Universe, consistent with a cosmological constant model. Assuming dark energy is a cosmological constant and varying the spatial curvature, we find Omega_k = -0.004 +/- 0.006.

AB - We present measurements of the baryon acoustic peak at redshifts z = 0.44, 0.6 and 0.73 in the galaxy correlation function of the final dataset of the WiggleZ Dark Energy Survey. We combine our correlation function with lower-redshift measurements from the 6-degree Field Galaxy Survey and Sloan Digital Sky Survey, producing a stacked survey correlation function in which the statistical significance of the detection of the baryon acoustic peak is 4.9-sigma relative to a zero-baryon model with no peak. We fit cosmological models to this combined baryon acoustic oscillation (BAO) dataset comprising six distance-redshift data points, and compare the results to similar fits to the latest compilation of supernovae (SNe) and Cosmic Microwave Background (CMB) data. The BAO and SNe datasets produce consistent measurements of the equation-of-state w of dark energy, when separately combined with the CMB, providing a powerful check for systematic errors in either of these distance probes. Combining all datasets we determine w = -1.03 +/- 0.08 for a flat Universe, consistent with a cosmological constant model. Assuming dark energy is a cosmological constant and varying the spatial curvature, we find Omega_k = -0.004 +/- 0.006.

KW - astro-ph.CO

KW - surveys

KW - cosmological parameters

KW - distance scale

KW - large-scale structure of Universe

U2 - 10.1111/j.1365-2966.2011.19592.x

DO - 10.1111/j.1365-2966.2011.19592.x

M3 - Article

SN - 0035-8711

VL - 418

SP - 1707

EP - 1724

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations

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Keywords

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