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

Identifieur interne : 000068 ( Main/Exploration ); précédent : 000067; suivant : 000069

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

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

Source :

RBID : pubmed:28066154

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  h(2), 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.

DOI: 10.1093/mnras/stw2725
PubMed: 28066154


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">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  h(2), 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.</div>
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<name sortKey="Pimbblet, Kevin A" sort="Pimbblet, Kevin A" uniqKey="Pimbblet K" first="Kevin A" last="Pimbblet">Kevin A. Pimbblet</name>
<name sortKey="Poole, Gregory B" sort="Poole, Gregory B" uniqKey="Poole G" first="Gregory B" last="Poole">Gregory B. Poole</name>
<name sortKey="Pracy, Michael" sort="Pracy, Michael" uniqKey="Pracy M" first="Michael" last="Pracy">Michael Pracy</name>
</country>
<country name="Canada">
<noRegion>
<name sortKey="Woods, David" sort="Woods, David" uniqKey="Woods D" first="David" last="Woods">David Woods</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000068 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000068 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Canada
   |area=    ParkinsonCanadaV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:28066154
   |texte=   Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: cosmological constraints.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:28066154" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a ParkinsonCanadaV1 

Wicri

This area was generated with Dilib version V0.6.29.
Data generation: Thu May 4 22:20:19 2017. Site generation: Fri Dec 23 23:17:26 2022