Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
Abstract
We present the temperature and polarization angular power spectra of the cosmic microwave background (CMB) derived from the first 5 years of WMAP data. The 5-year temperature (TT) spectrum is cosmic variance limited up to multipole l=530, and individual l-modes have S/N>1 for l<920. The best fitting six-parameter LambdaCDM model has a reduced chi^2 for l=33-1000 of chi^2/nu=1.06, with a probability to exceed of 9.3%. There is now significantly improved data near the third peak which leads to improved cosmological constraints. The temperature-polarization correlation (TE) is seen with high significance. After accounting for foreground emission, the low-l reionization feature in the EE power spectrum is preferred by \Delta\chi^2=19.6 for optical depth tau=0.089 by the EE data alone, and is now largely cosmic variance limited for l=2-6. There is no evidence for cosmic signal in the BB, TB, or EB spectra after accounting for foreground emission. We find that, when averaged over l=2-6, l(l+1)C^{BB}_l/2\pi < 0.15 uK^2 (95% CL).
Keywords
Cite
@article{arxiv.0803.0593,
title = {Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra},
author = {M. R. Nolta and J. Dunkley and R. S. Hill and G. Hinshaw and E. Komatsu and D. Larson and L. Page and D. N. Spergel and C. L. Bennett and B. Gold and N. Jarosik and N. Odegard and J. L. Weiland and E. Wollack and M. Halpern and A. Kogut and M. Limon and S. S. Meyer and G. S. Tucker and E. L. Wright},
journal= {arXiv preprint arXiv:0803.0593},
year = {2009}
}
Comments
29 pages, 13 figures, accepted by ApJS