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题名: No evidence for the blue-tilted power spectrum of relic gravitational waves
作者: Huang, QG;  Wang, S
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2015
期号: 6, 页码:21
关键词: inflation ;  gravitational waves and CMBR polarization
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1088/1475-7516/2015/06/021
通讯作者: Huang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: In this paper, we constrain the tilt of the power spectrum of relic gravitational waves by combining the data from BICEP2/Keck Array and Planck (BKP) and the Laser Interferometer Gravitational-Waves Observatory (LIGO). Supposing the linearly uniform priors for both the tensor-to-scalar ratio r and the tensor tilt n(t), we find n(t) = 0.66(-1.44)(+1.83) at the 68% confidence level from the data of BKP B-modes. By further adding the LIGO upper limit on the intensity of stochastic gravitational-wave background, the constraint becomes n(t) = -0.76(-0.52)(+1.37) at the 68% confidence level by assuming that the tensor amplitude has the similar order of the upper bounds from current CMB experiments. We find that there is no evidence for a blue-tilted power spectrum of relic gravitational waves and either sign of the index of tensor power spectrum is compatible with the current data.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: INFLATIONARY UNIVERSE ;  PERTURBATIONS ;  COSMOLOGY ;  FLATNESS ;  HORIZON ;  PLANCK ;  MODELS ;  BICEP2 ;  PROBE
收录类别: SCI
项目资助者: project of Knowledge Innovation Program of Chinese Academy of Science ;  NSFC [11322545, 11335012]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20977
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Recommended Citation:
Huang, QG,Wang, S. No evidence for the blue-tilted power spectrum of relic gravitational waves[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(6):21.
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