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Huang, QG; Wang, S4
Optimistic estimation on probing primordial gravitational waves with CMB B-mode polarization
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
KeywordINFLATIONARY UNIVERSE ANISOTROPIES FLATNESS HORIZON
AbstractIn the measurements of cosmic microwave background polarizations, three frequency channels are necessary for discriminating the primordial B-modes from the polarized dust and the synchrotron emission. We carry out an optimistic estimate on the sensitivity to the detection of primordial gravitational waves using the cosmic microwave background B-modes only, and explore how to reach the thresholds for the tensor-to-scalar ratio r in the theoretically well-motivated inflation models. For example, Lyth bound implies r similar or equal to 2 x 10(-3) , a corrected Lyth bound shows r similar or equal to 7 x 10(-4), and some typical inflation models gives r similar or equal to 4 x 10(-5). Taking into account the up-to-date constraints on r, i.e. r(0.05) < 0.07 at 95 per cent confidence, we find that the consistency relation n(t) = -r/8 in the canonical single-field slow-roll inflation cannot be distinguished from the scale invariance, due to the cosmic variance in the power spectrum of cosmic microwave background B modes. The cosmic variance places an inevitable limit on the measurements of the tensor spectral index, i.e. sigma(nt) similar or equal to 0.01 for 2 <= l <= l(max) = 300.
2019
ISSN0035-8711
Volume483Issue:2Pages:2177-2184
Subject AreaAstronomy & Astrophysics
MOST Discipline CatalogueAstronomy & Astrophysics
DOI10.1093/mnras/sty3262
Indexed BySCIE
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23495
CollectionSCI期刊论文
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China
4.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China
5.Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China
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GB/T 7714
Huang, QG,Wang, S. Optimistic estimation on probing primordial gravitational waves with CMB B-mode polarization[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,483(2):2177-2184.
APA Huang, QG,&Wang, S.(2019).Optimistic estimation on probing primordial gravitational waves with CMB B-mode polarization.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,483(2),2177-2184.
MLA Huang, QG,et al."Optimistic estimation on probing primordial gravitational waves with CMB B-mode polarization".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.2(2019):2177-2184.
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