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The WiggleZ Dark Energy Survey: testing the cosmological model with baryon acoustic oscillations at z=0.6

Blake, C.A.; Davis, Tamara; Poole, Gregory B; Parkinson, David; Brough, Sarah; Colless, Matthew; Contreras, Carlos; Couch, Warrick; Croom, Scott; Drinkwater, Michael John; Forster, Karl; Gilbank, David; Gladders, Mike; Jurek, Russell J.; Madore, Barry; Pracy, Michael; Woods, David; Yee, H. K. C.; Wyder, Ted

Description

We measure the imprint of baryon acoustic oscillations (BAOs) in the galaxy clustering pattern at the highest redshift achieved to date, z= 0.6, using the distribution of N= 132509 emission-line galaxies in the WiggleZ Dark Energy Survey. We quantify BAOs using three statistics: the galaxy correlation function, power spectrum and the band-filtered estimator introduced by Xu et al. The results are mutually consistent, corresponding to a 4.0 per cent measurement of the cosmic distance-redshift...[Show more]

dc.contributor.authorBlake, C.A.
dc.contributor.authorDavis, Tamara
dc.contributor.authorPoole, Gregory B
dc.contributor.authorParkinson, David
dc.contributor.authorBrough, Sarah
dc.contributor.authorColless, Matthew
dc.contributor.authorContreras, Carlos
dc.contributor.authorCouch, Warrick
dc.contributor.authorCroom, Scott
dc.contributor.authorDrinkwater, Michael John
dc.contributor.authorForster, Karl
dc.contributor.authorGilbank, David
dc.contributor.authorGladders, Mike
dc.contributor.authorJurek, Russell J.
dc.contributor.authorMadore, Barry
dc.contributor.authorPracy, Michael
dc.contributor.authorWoods, David
dc.contributor.authorYee, H. K. C.
dc.contributor.authorWyder, Ted
dc.date.accessioned2015-12-10T22:56:24Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/60225
dc.description.abstractWe measure the imprint of baryon acoustic oscillations (BAOs) in the galaxy clustering pattern at the highest redshift achieved to date, z= 0.6, using the distribution of N= 132509 emission-line galaxies in the WiggleZ Dark Energy Survey. We quantify BAOs using three statistics: the galaxy correlation function, power spectrum and the band-filtered estimator introduced by Xu et al. The results are mutually consistent, corresponding to a 4.0 per cent measurement of the cosmic distance-redshift relation at z= 0.6 [in terms of the acoustic parameter 'A(z)' introduced by Eisenstein et al., we find A(z= 0.6) = 0.452 ± 0.018]. Both BAOs and power spectrum shape information contribute towards these constraints. The statistical significance of the detection of the acoustic peak in the correlation function, relative to a wiggle-free model, is 3.2σ. The ratios of our distance measurements to those obtained using BAOs in the distribution of luminous red galaxies at redshifts z= 0.2 and 0.35 are consistent with a flat Λ cold dark matter model that also provides a good fit to the pattern of observed fluctuations in the cosmic microwave background radiation. The addition of the current WiggleZ data results in a ≈30 per cent improvement in the measurement accuracy of a constant equation of state, w, using BAO data alone. Based solely on geometric BAO distance ratios, accelerating expansion (w < -1/3) is required with a probability of 99.8 per cent, providing a consistency check of conclusions based on supernovae observations. Further improvements in cosmological constraints will result when the WiggleZ survey data set is complete.
dc.publisherBlackwell Publishing Ltd
dc.rightsAuthor/s retain copyright
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectKeywords: Cosmological parameters; Dark energy; Large-scale structure of Universe; Surveys
dc.titleThe WiggleZ Dark Energy Survey: testing the cosmological model with baryon acoustic oscillations at z=0.6
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume415
dc.date.issued2011
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationf5625xPUB529
local.identifier.ariespublicationu4630950xPUB123
local.type.statusPublished Version
local.contributor.affiliationBlake, C.A., University of British Columbia
local.contributor.affiliationDavis, Tamara, University of Queensland
local.contributor.affiliationPoole, Gregory B, Swinburne University of Technology
local.contributor.affiliationParkinson, David, University of Queensland
local.contributor.affiliationBrough, Sarah, Australian Astronomical Observatory
local.contributor.affiliationColless, Matthew, Australian Astronomical Observatory
local.contributor.affiliationContreras, Carlos, Swinburne University of Technology
local.contributor.affiliationCouch, Warrick, Swinburne University of Technology
local.contributor.affiliationCroom, Scott, Anglo-Australian Observatory
local.contributor.affiliationDrinkwater, Michael John, University of Queensland
local.contributor.affiliationForster, Karl, California Institute of Technology
local.contributor.affiliationGilbank, David, University of Waterloo
local.contributor.affiliationGladders, Mike, University of Chicago
local.contributor.affiliationJurek, Russell J., CSIRO
local.contributor.affiliationMadore, Barry, Observatories of the Carnegie Institution of Washington
local.contributor.affiliationPracy, Michael, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWoods, David, University of British Columbia
local.contributor.affiliationYee, H. K. C., University of Toronto
local.contributor.affiliationWyder, Ted, California Institute of Technology
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage2892
local.bibliographicCitation.lastpage2909
local.identifier.doi10.1111/j.1365-2966.2011.19077.x
dc.date.updated2016-02-24T09:26:39Z
local.identifier.scopusID2-s2.0-79961031568
local.identifier.thomsonID000294173900073
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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