Constraints on the cosmological parameters from BICEP2, Planck, and WMAP

被引：5

作者：

Cheng, Cheng ^{[1
]}

Huang, Qing-Guo ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2014年 / 74卷 / 11期

关键词：

MICROWAVE BACKGROUND ANISOTROPIES; INFLATIONARY UNIVERSE; FLATNESS; HORIZON;

D O I：

10.1140/epjc/s10052-014-3139-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper we constrain the cosmological parameters, in particular the tilt of tensor power spectrum, by adopting Background Imaging of Cosmic Extragalactic Polarization (B2), Planck released in 2013 and Wilkinson Microwaves Anisotropy Probe 9-year Polarization data. We find that a blue tilted tensor power spectrum is preferred at more than 3 sigma confidence level if the data from B2 are assumed to be totally interpreted as the relic gravitational waves, but a scale-invariant tensor power spectrum is consistent with the data once the polarized dust is taken into account. The recent Planck 353 GHz HFI dust polarization data imply that the B2 data are perfectly consistent with there being no gravitational wave signal.

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