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

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010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
刊名	PHYSICAL REVIEW D
	2015
卷号	91 期号:10 页码:103001
通讯作者	Cai, Y (reprint author), Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China.
英文摘要	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.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
关键词[WOS]	FIELD-EQUATIONS ; SPECTRUM ; INFLATION ; UNIVERSE ; CMB ; PERTURBATIONS ; RADIATION ; COSMOLOGY ; TENSOR ; SCALE
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21004]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Cai, Y,Wang, YT,Piao, YS. 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.(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.