The VIMOS Public Extragalactic Redshift Survey (VIPERS): The matter density and baryon fraction from the galaxy power spectrum at redshift 0.6 < z < 1.1
Articolo
Data di Pubblicazione:
2017
Citazione:
The VIMOS Public Extragalactic Redshift Survey (VIPERS): The matter density and baryon fraction from the galaxy power spectrum at redshift 0.6 < z < 1.1 / S. Rota, B.R. Granett, J. Bel, L. Guzzo, J.A. Peacock, M.J. Wilson, A. Pezzotta, S. De La Torre, B. Garilli, M. Bolzonella, M. Scodeggio, U. Abbas, C. Adami, D. Bottini, A. Cappi, O. Cucciati, I. Davidzon, P. Franzetti, A. Fritz, A. Iovino, J. Krywult, V. Le Brun, O. Le Fèvre, D. Maccagni, K. Małek, F. Marulli, W.J. Percival, M. Polletta, A. Pollo, L.A.M. Tasca, R. Tojeiro, D. Vergani, A. Zanichelli, S. Arnouts, E. Branchini, J. Coupon, G. De Lucia, O. Ilbert, L. Moscardini, T. Moutard. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 601(2017), pp. A144.1-A144.15.
Abstract:
We use the final catalogue of the VIMOS Public Extragalactic Redshift Survey (VIPERS) to measure the power spectrum of the galaxy distribution at high redshift, presenting results that extend beyond z = 1 for the first time. We apply a fast Fourier transform technique to four independent subvolumes comprising a total of 51 728 galaxies at 0.6 < z < 1.1 (out of the nearly 90 000 included in the whole survey). We concentrate here on the shape of the direction-averaged power spectrum in redshift space, explaining the level of modelling of redshift-space anisotropies and the anisotropic survey window function that are needed to deduce this in a robust fashion. We then use covariance matrices derived from a large ensemble of mock datasets in order to fit the spectral data. The results are well matched by a standard ÎCDM model, with density parameter ΩMh = 0.227+0.063-0.050ΩMh=0.227-0.050+0.063 and baryon fraction fB=ΩB/ΩM=0.220+0.058-0.072fB=ΩB/ΩM=0.220-0.072+0.058. These inferences from the high-z galaxy distribution are consistent with results from local galaxy surveys, and also with the cosmic microwave background. Thus the ÎCDM model gives a good match to cosmic structure at all redshifts currently accessible to observational study.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Cosmological parameters; Galaxies: high-redshift; Galaxies: statistics; Large-scale structure of Universe; Astronomy and Astrophysics; Space and Planetary Science
Elenco autori:
S. Rota, B.R. Granett, J. Bel, L. Guzzo, J.A. Peacock, M.J. Wilson, A. Pezzotta, S. De La Torre, B. Garilli, M. Bolzonella, M. Scodeggio, U. Abbas, C. Adami, D. Bottini, A. Cappi, O. Cucciati, I. Davidzon, P. Franzetti, A. Fritz, A. Iovino, J. Krywult, V. Le Brun, O. Le Fèvre, D. Maccagni, K. Małek, F. Marulli, W.J. Percival, M. Polletta, A. Pollo, L.A.M. Tasca, R. Tojeiro, D. Vergani, A. Zanichelli, S. Arnouts, E. Branchini, J. Coupon, G. De Lucia, O. Ilbert, L. Moscardini, T. Moutard
Link alla scheda completa: