Recently, two issues concerning the three-year Wilkinson Microwave Anisotropy Probe (WMAP) likelihood code were pointed out. On large angular scales (l less than or similar to 30), a suboptimal likelihood approximation resulted in a small power excess. On small angular scales (l greater than or similar to 300), over-subtraction of unresolved point sources produced a small power deficit. For a minimal six-parameter cosmological model, these two effects conspired to decrease the value of n(s) by similar to 0.7 sigma. In this paper, we study the change in preferred parameter ranges for extended cosmological models, including running of n(s), massive neutrinos, curvature, and the equation of state for dark energy. We also include large-scale structure and supernova data in our analysis. We find that the parameter ranges for alpha(s), Omega(k) and w are not much altered by the modified analysis. For massive neutrinos the upper limit on the sum of the neutrino masses decreases from M-nu < 1.90 eV to M-nu < 1.57 eV when using the modified WMAP code and WMAP data only. We also find that the shift of n(s) to higher values is quite robust to these extensions of the minimal cosmological model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据