The WiggleZ Dark Energy Survey: Final data release and cosmological results

Дата и время публикации : 2012-10-08T01:50:37Z

Авторы публикации и институты :
David Parkinson
Signe Riemer-Sørensen
Chris Blake
Gregory B. Poole
Tamara M. Davis
Sarah Brough
Matthew Colless
Carlos Contreras
Warrick Couch
Scott Croom
Darren Croton
Michael J. Drinkwater
Karl Forster
David Gilbank
Mike Gladders
Karl Glazebrook
Ben Jelliffe
Russell J. Jurek
I-hui Li
Barry Madore
D. Christopher Martin
Kevin Pimbblet
Michael Pracy
Rob Sharp
Emily Wisnioski
David Woods
Ted K. Wyder
H. K. C. Yee

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 23 pages, 19 figures. The data and analysis module are publicly available at http://smp.uq.edu.au/wigglez-data
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: This paper presents cosmological results from the final data release of the WiggleZ Dark Energy Survey. We perform full analyses of different cosmological models using the WiggleZ power spectra measured at z=0.22, 0.41, 0.60, and 0.78, combined with other cosmological datasets. The limiting factor in this analysis is the theoretical modelling of the galaxy power spectrum, including non-linearities, galaxy bias, and redshift-space distortions. In this paper we assess several different methods for modelling the theoretical power spectrum, testing them against the Gigaparsec WiggleZ simulations (GiggleZ). We fit for a base set of 6 cosmological parameters, {Omega_b h^2, Omega_CDM h^2, H_0, tau, A_s, n_s}, and 5 supplementary parameters {n_run, r, w, Omega_k, sum m_nu}. In combination with the Cosmic Microwave Background (CMB), our results are consistent with the LambdaCDM concordance cosmology, with a measurement of the matter density of Omega_m =0.29 +/- 0.016 and amplitude of fluctuations sigma_8 = 0.825 +/- 0.017. Using WiggleZ data with CMB and other distance and matter power spectra data, we find no evidence for any of the extension parameters being inconsistent with their LambdaCDM model values. The power spectra data and theoretical modelling tools are available for use as a module for CosmoMC, which we here make publicly available at http://smp.uq.edu.au/wigglez-data . We also release the data and random catalogues used to construct the baryon acoustic oscillation correlation function.

Category: Physics