Komatsu 2008 WMAP 5年观测结果

主要内容:
利用5年的数据重新定了一遍omega_m, omega_lambda, omega_k, 等宇宙学参数的值。

精彩摘抄:


文章信息:

arXiv:0803.0547 [ps, pdf, other]

Title: Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation

Authors: E. Komatsu, J. Dunkley, M. R. Nolta, C. L. Bennett, B. Gold, G. Hinshaw, N. Jarosik, D. Larson, M. Limon, L. Page, D. N. Spergel, M. Halpern, R. S. Hill, A. Kogut, S. S. Meyer, G. S. Tucker, J. L. Weiland, E. Wollack, E. L. Wright

Comments: 49 pages, 20 figures, submitted to ApJS

Subjects: Astrophysics (astro-ph)

(Abridged) The WMAP 5-year data strongly limit deviations from the minimal LCDM model. We constrain the physics of inflation via Gaussianity, adiabaticity, the power spectrum shape, gravitational waves, and spatial curvature. We also constrain the properties of dark energy, parity-violation, and neutrinos. We detect no convincing deviations from the minimal model. The parameters of the LCDM model, derived from WMAP combined with the distance measurements from the Type Ia supernovae (SN) and the Baryon Acoustic Oscillations (BAO), are: Omega_b=0.0462+-0.0015, Omega_c=0.233+-0.013, Omega_Lambda=0.721+-0.015, H_0=70.1+-1.3 km/s/Mpc, n_s=0.960+0.014-0.013, tau=0.084+-0.016, and sigma_8=0.817+-0.026. With WMAP+BAO+SN, we find the tensor-to-scalar ratio r<0.20>1 is disfavored regardless of r. We obtain tight, simultaneous limits on the (constant) equation of state of dark energy and curvature. We provide a set of "WMAP distance priors," to test a variety of dark energy models. We test a time-dependent w with a present value constrained as -0.38<1+w_0<0.14>