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Huang, QG; Wang, S; Huang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
No evidence for the blue-tilted power spectrum of relic gravitational waves
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Language英语
KeywordInflation Gravitational Waves And Cmbr Polarization
AbstractIn 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.
2015
Issue6Pages:21
Subject AreaAstronomy & Astrophysics ; Physics
DOIhttp://dx.doi.org/10.1088/1475-7516/2015/06/021
Indexed BySCI
Funding Organizationproject of Knowledge Innovation Program of Chinese Academy of Science ; project of Knowledge Innovation Program of Chinese Academy of Science ; project of Knowledge Innovation Program of Chinese Academy of Science ; project of Knowledge Innovation Program of Chinese Academy of Science ; NSFC [11322545, 11335012] ; NSFC [11322545, 11335012] ; NSFC [11322545, 11335012] ; NSFC [11322545, 11335012]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20977
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHuang, QG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Huang, QG,Wang, S,Huang, QG . No evidence for the blue-tilted power spectrum of relic gravitational waves[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(6):21.
APA Huang, QG,Wang, S,&Huang, QG .(2015).No evidence for the blue-tilted power spectrum of relic gravitational waves.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),21.
MLA Huang, QG,et al."No evidence for the blue-tilted power spectrum of relic gravitational waves".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2015):21.
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