QQ客服 官方微博 反馈留言

	Measuring the primordial curvature perturbations from the scalar induced gravitational waves
	Li, Jun1; Guo, Guang-Hai
刊名	PHYSICAL REVIEW D
	2023
卷号	107期号:4页码:43536
ISSN号	2470-0010
DOI	10.1103/PhysRevD.107.043536
英文摘要	Scalar induced gravitational waves are produced from primordial curvature perturbations in the second order of perturbations. We constrain the fractional energy density of scalar induced gravitational waves from gravitational wave observations. If there is no detection of scalar induced gravitational waves, the fractional energy density of scalar induced gravitational waves is constrained by some upper limits. Depending on these upper limits, we can obtain the constraints on the power spectrum of the primordial curvature perturbations. For a power-law scalar power spectrum, the constraints on the power spectrum are affected by adding the upper limit of scalar induced gravitational waves from the Square Kilometer Array (SKA). In the standard model, the mean values of the scalar amplitude and the spectral index shift to lower values when the SKA is added to the combination of cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) datasets, namely ln (1010As) = 3.038 +/- 0.013 and Its = 0.9589+0.0021 -0.0011 at 68% confidence level. We also consider the effects of the existing ground-based gravitational-wave detectors, the existing pulsar timing arrays and Five-hundred-meter Aperture Spherical radio Telescope, while the constraints from CMB + BAO datasets are totally within their upper limits of scalar induced gravitational waves. Furthermore, we characterize the scalar fluctuation spectrum in terms of the spectral index Its and its first two derivatives. We calculate corresponding power spectrum of scalar induced gravitational waves theoretically and give the constraints on the running of the spectral index and the running of the running of the spectral index.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28019]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Jun,Guo, Guang-Hai. Measuring the primordial curvature perturbations from the scalar induced gravitational waves[J]. PHYSICAL REVIEW D,2023,107(4):43536.
APA	Li, Jun,&Guo, Guang-Hai.(2023).Measuring the primordial curvature perturbations from the scalar induced gravitational waves.PHYSICAL REVIEW D,107(4),43536.
MLA	Li, Jun,et al."Measuring the primordial curvature perturbations from the scalar induced gravitational waves".PHYSICAL REVIEW D 107.4(2023):43536.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。