热门
Gravitational-Wave Cosmology across 29 Decades in Frequency
文献类型：期刊论文
| 作者 | Lasky, Paul D.1; Mingarelli, Chiara M. F.2,3; Smith, Tristan L.4; Giblin, John T., Jr.5,6,7; Thrane, Eric1; Reardon, Daniel J.1; Caldwell, Robert8; Bailes, Matthew9; Bhat, N. D. Ramesh10; Burke-Spolaor, Sarah11 |
| 刊名 | PHYSICAL REVIEW X
 |
| 出版日期 | 2016-03-31 |
| 卷号 | 6期号:1 |
| ISSN号 | 2160-3308 |
| 英文摘要 | Quantum fluctuations of the gravitational field in the early Universe, amplified by inflation, produce a primordial gravitational-wave background across a broad frequency band. We derive constraints on the spectrum of this gravitational radiation, and hence on theories of the early Universe, by combining experiments that cover 29 orders of magnitude in frequency. These include Planck observations of cosmic microwave background temperature and polarization power spectra and lensing, together with baryon acoustic oscillations and big bang nucleosynthesis measurements, as well as new pulsar timing array and ground-based interferometer limits. While individual experiments constrain the gravitational-wave energy density in specific frequency bands, the combination of experiments allows us to constrain cosmological parameters, including the inflationary spectral index n(t) and the tensor-to-scalar ratio r. Results from individual experiments include the most stringent nanohertz limit of the primordial background to date from the Parkes Pulsar Timing Array, Omega(GW)(f) < 2.3 x 10(-10). Observations of the cosmic microwave background alone limit the gravitational-wave spectral index at 95% confidence to n(t) less than or similar to 5 for a tensor-to-scalar ratio of r = 0.11. However, the combination of all the above experiments limits n(t) < 0.36. Future Advanced LIGO observations are expected to further constrain n(t) < 0.34 by 2020. When cosmic microwave background experiments detect a nonzero r, our results will imply even more stringent constraints on nt and, hence, theories of the early Universe. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | MICROWAVE BACKGROUND ANISOTROPIES ; GRAVITY-WAVES ; PERTURBATIONS ; POLARIZATION ; MODELS ; UNIVERSE ; PROBE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000373099800001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/1388]  |
| 专题 | 脉冲星研究团组 新疆天文台_射电天文研究室 |
| 作者单位 | 1.Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Clayton, Vic 3800, Australia 2.CALTECH, TAPIR Grp, MC 350-17, Pasadena, CA 91125 USA 3.Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany 4.Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA 5.Kenyon Coll, Dept Phys, Gambier, OH 43022 USA 6.Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA 7.Case Western Reserve Univ, CERCA, Cleveland, OH 44106 USA 8.Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA 9.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia 10.Curtin Univ Technol, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia |
| 推荐引用方式 GB/T 7714 | Lasky, Paul D.,Mingarelli, Chiara M. F.,Smith, Tristan L.,et al. Gravitational-Wave Cosmology across 29 Decades in Frequency[J]. PHYSICAL REVIEW X,2016,6(1). |
| APA | Lasky, Paul D..,Mingarelli, Chiara M. F..,Smith, Tristan L..,Giblin, John T., Jr..,Thrane, Eric.,...&Zhu, Xingjiang.(2016).Gravitational-Wave Cosmology across 29 Decades in Frequency.PHYSICAL REVIEW X,6(1). |
| MLA | Lasky, Paul D.,et al."Gravitational-Wave Cosmology across 29 Decades in Frequency".PHYSICAL REVIEW X 6.1(2016). |
入库方式： OAI收割
来源：新疆天文台
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。