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Cai, Y; Wang, YT; Piao, YS; Cai, Y (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
发表期刊PHYSICAL REVIEW D
语种英语
摘要In low-energy effective string theory and modified gravity theories, the propagating speed c(T) of primordial gravitational waves may deviate from unity. We find that the steplike variation of c(T) during slow-roll inflation may result in an oscillating modulation to the B-mode polarization spectrum, which can hardly be imitated by adjusting other cosmological parameters, and the intensity of the modulation is determined by the dynamics of c(T). Thus provided that the foreground contribution is under control, high-precision cosmic microwave background (CMB) polarization observations will be able to put tight constraint on the variation of c(T), and so the corresponding theories.
2015
卷号91期号:10页码:103001
学科领域Astronomy & Astrophysics ; Physics
DOIhttp://dx.doi.org/10.1103/PhysRevD.91.103001
收录类别SCI
项目资助者NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804]
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21004
专题理论物理所科研产出_SCI论文
通讯作者Cai, Y (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
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GB/T 7714
Cai, Y,Wang, YT,Piao, YS,et al. Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves[J]. PHYSICAL REVIEW D,2015,91(10):103001.
APA Cai, Y,Wang, YT,Piao, YS,&Cai, Y .(2015).Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves.PHYSICAL REVIEW D,91(10),103001.
MLA Cai, Y,et al."Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves".PHYSICAL REVIEW D 91.10(2015):103001.
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