Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves

doi:http://dx.doi.org/10.1103/PhysRevD.91.103001

ITP OpenIR > 理论物理所2015年知识产出

	Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
	Cai, Y; Wang, YT; Piao, YS; Cai, Y (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
	2015
发表期刊	PHYSICAL REVIEW D
卷号	91 期号:10 页码:103001
文章类型	Article
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.
学科领域	Astronomy & Astrophysics ; Physics
资助者	NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804]
DOI	http://dx.doi.org/10.1103/PhysRevD.91.103001
关键词[WOS]	FIELD-EQUATIONS ; SPECTRUM ; INFLATION ; UNIVERSE ; CMB ; PERTURBATIONS ; RADIATION ; COSMOLOGY ; TENSOR ; SCALE
收录类别	SCI
语种	英语
资助者	NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804] ; NSFC [11222546] ; NSFC [11222546] ; National Basic Research Program of China [2010CB832804] ; National Basic Research Program of China [2010CB832804]
WOS类目	Astronomy & Astrophysics ; Physics, Particles & Fields
引用统计
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2015年知识产出
通讯作者	Cai, Y (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
推荐引用方式 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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