The WiggleZ Dark Energy Survey: testing the cosmological model with baryon acoustic oscillations at z=0.6
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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.author | Blake, C.A. | |
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dc.contributor.author | Davis, Tamara | |
dc.contributor.author | Poole, Gregory B | |
dc.contributor.author | Parkinson, David | |
dc.contributor.author | Brough, Sarah | |
dc.contributor.author | Colless, Matthew | |
dc.contributor.author | Contreras, Carlos | |
dc.contributor.author | Couch, Warrick | |
dc.contributor.author | Croom, Scott | |
dc.contributor.author | Drinkwater, Michael John | |
dc.contributor.author | Forster, Karl | |
dc.contributor.author | Gilbank, David | |
dc.contributor.author | Gladders, Mike | |
dc.contributor.author | Jurek, Russell J. | |
dc.contributor.author | Madore, Barry | |
dc.contributor.author | Pracy, Michael | |
dc.contributor.author | Woods, David | |
dc.contributor.author | Yee, H. K. C. | |
dc.contributor.author | Wyder, Ted | |
dc.date.accessioned | 2015-12-10T22:56:24Z | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/60225 | |
dc.description.abstract | 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 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.publisher | Blackwell Publishing Ltd | |
dc.rights | Author/s retain copyright | |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Keywords: Cosmological parameters; Dark energy; Large-scale structure of Universe; Surveys | |
dc.title | The WiggleZ Dark Energy Survey: testing the cosmological model with baryon acoustic oscillations at z=0.6 | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 415 | |
dc.date.issued | 2011 | |
local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | |
local.identifier.ariespublication | f5625xPUB529 | |
local.identifier.ariespublication | u4630950xPUB123 | |
local.type.status | Published Version | |
local.contributor.affiliation | Blake, C.A., University of British Columbia | |
local.contributor.affiliation | Davis, Tamara, University of Queensland | |
local.contributor.affiliation | Poole, Gregory B, Swinburne University of Technology | |
local.contributor.affiliation | Parkinson, David, University of Queensland | |
local.contributor.affiliation | Brough, Sarah, Australian Astronomical Observatory | |
local.contributor.affiliation | Colless, Matthew, Australian Astronomical Observatory | |
local.contributor.affiliation | Contreras, Carlos, Swinburne University of Technology | |
local.contributor.affiliation | Couch, Warrick, Swinburne University of Technology | |
local.contributor.affiliation | Croom, Scott, Anglo-Australian Observatory | |
local.contributor.affiliation | Drinkwater, Michael John, University of Queensland | |
local.contributor.affiliation | Forster, Karl, California Institute of Technology | |
local.contributor.affiliation | Gilbank, David, University of Waterloo | |
local.contributor.affiliation | Gladders, Mike, University of Chicago | |
local.contributor.affiliation | Jurek, Russell J., CSIRO | |
local.contributor.affiliation | Madore, Barry, Observatories of the Carnegie Institution of Washington | |
local.contributor.affiliation | Pracy, Michael, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Woods, David, University of British Columbia | |
local.contributor.affiliation | Yee, H. K. C., University of Toronto | |
local.contributor.affiliation | Wyder, Ted, California Institute of Technology | |
local.bibliographicCitation.issue | 3 | |
local.bibliographicCitation.startpage | 2892 | |
local.bibliographicCitation.lastpage | 2909 | |
local.identifier.doi | 10.1111/j.1365-2966.2011.19077.x | |
dc.date.updated | 2016-02-24T09:26:39Z | |
local.identifier.scopusID | 2-s2.0-79961031568 | |
local.identifier.thomsonID | 000294173900073 | |
dcterms.accessRights | Open Access | |
Collections | ANU Research Publications |
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