Constraints on the inflationary expansion from three-year WMAP, small scale CMB anisotropies and large scale structure data sets

摘要: We present the constraints on inflationary parameters in a flat ΛCDM universe obtained from Wilkinson Microwave Anisotropy Probe (WMAP) three-year data release, plus smaller scale cosmic microwave background (CMB) and two large structure (LSS) sets, 2dF Sloan Digital Sky Survey (SDSS) (treated separately). use Markov chain Monte Carlo (MCMC) technique combined with an analytic description of spectra terms horizon flow functions (HFF). By imposing consistency condition for tensor-to-scalar ratio, we study both single field standard inflation violation null energy condition, which leads to blue spectrum gravitational waves. For inflation, constraint ratio obtain CMB 2dF05 is r0.01<0.26 at 2σ confidence level. Without between tensor slope, amplitude not significantly changed, but HFFs are relaxed. then show that when third HFF 3 allowed be non-zero order unity, negative (at 2σ) value running scalar spectral index found any set consider.