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The power spectrum from the angular distribution of galaxies in the CFHTLS-Wide fields at redshift ~0.7

Research output: Contribution to journalArticle

Author(s)

B. R. Granett, L. Guzzo, J. Coupon, S. Arnouts, P. Hudelot, O. Ilbert, H. J. McCracken, Y. Mellier, C. Adami, J. Bel, M. Bolzonella, D. Bottini, A. Cappi, O. Cucciati, S. de la Torre, P. Franzetti, A. Fritz, B. Garilli, A. Iovino, J. Krywult & 15 more V. Le Brun, O. Le Fevre, D. Maccagni, K. Malek, F. Marulli, B. Meneux, L. Paioro, M. Polletta, A. Pollo, M. Scodeggio, H. Schlagenhaufer, L. Tasca, R. Tojeiro, D. Vergani, A. Zanichelli

School/Research organisations

Abstract

We measure the real-space galaxy power spectrum on large scales at redshifts 0.5–1.2 using optical colour selected samples from the Canada–France–Hawaii Telescope Legacy Survey. With the redshift distributions measured with a preliminary ∼14 000 spectroscopic redshifts from the VIMOS Public Extragalactic Redshift Survey (VIPERS), we deproject the angular distribution and directly estimate the three-dimensional power spectrum. We use a maximum likelihood estimator that is optimal for a Gaussian random field giving well-defined window functions and error estimates. This measurement presents an initial look at the large-scale structure field probed by the VIPERS. We measure the galaxy bias of the VIPERS-like sample to be bg= 1.38 ± 0.05 (σ8= 0.8) on scales k < 0.2 h Mpc−1 averaged over 0.5 < z < 1.2. We further investigate three photometric redshift slices, and marginalizing over the bias factors while keeping other Λ cold dark matter parameters fixed, we find the matter density Ωm= 0.30 ± 0.06.
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Original languageEnglish
Pages (from-to)251-261
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume421
Issue number1
Early online date6 Mar 2012
DOIs
Publication statusPublished - 21 Mar 2012

    Research areas

  • Methods: statistical, Cosmology: observations, Large-scale structure of Universe

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