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Cai, Y; Wang, YT![]() | |
Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves | |
发表期刊 | PHYSICAL REVIEW D
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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 |
DOI | http://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] |
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. |
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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Oscillating modulati(324KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
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