Non-tensorial gravitational wave background in NANOGrav 12.5-year data set
文献类型：期刊论文
| 作者 | Chen, Zu-Cheng; Yuan, Chen; Huang, Qing-Guo
|
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2021 |
| 卷号 | 64期号:12页码:120412 |
| 关键词 | PULSAR-TIMING PACKAGE HOLE BINARY-SYSTEMS ARRAY LIMITS BLACK-HOLES SEARCH CONSTRAINTS RADIATION TEMPO2 PROBE |
| ISSN号 | 1674-7348 |
| DOI | 10.1007/s11433-021-1797-y |
| 英文摘要 | We perform the first search for an isotropic non-tensorial gravitational-wave background (GWB) allowed in general metric theories of gravity in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) 12.5-year data set. By modeling the GWB as a power-law spectrum, we find strong Bayesian indication for a spatially correlated process with scalar transverse (ST) correlations whose Bayes factor versus the spatially uncorrelated common-spectrum process is 107 +/- 7, but no statistically significant evidence for the tensor transverse, vector longitudinal, and scalar longitudinal polarization modes. The median and the 90% equal-tail amplitudes of ST mode are A(ST) = 1.06(-0.28)(+0.35) x 10(-15), or equivalently the energy density parameter per logarithm frequency is Omega(ST)(GW) = 1.54(-0.71)(+1.21) x 10(-9), at frequency of 1/year. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27640]  |
| 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.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 2.[Chen, Zu-Cheng 3.Yuan, Chen 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 6.Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zu-Cheng,Yuan, Chen,Huang, Qing-Guo. Non-tensorial gravitational wave background in NANOGrav 12.5-year data set[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2021,64(12):120412. |
| APA | Chen, Zu-Cheng,Yuan, Chen,&Huang, Qing-Guo.(2021).Non-tensorial gravitational wave background in NANOGrav 12.5-year data set.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,64(12),120412. |
| MLA | Chen, Zu-Cheng,et al."Non-tensorial gravitational wave background in NANOGrav 12.5-year data set".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 64.12(2021):120412. |
入库方式： OAI收割
来源：理论物理研究所
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