Measuring the primordial curvature perturbations from the scalar induced gravitational waves
文献类型：期刊论文
| 作者 | Li, Jun1; Guo, Guang-Hai |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
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。