Inflationary non-Gaussianity from thermal fluctuations
文献类型：期刊论文
| 作者 | Chen, Bin; Wang, Yi; Xue, Wei; Chen, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China |
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2008 |
| 期号 | 5页码:- |
| 关键词 | Angular Power Spectrum Probe Wmap Observations Cosmological Parameters Universe Scenario K-inflation Perturbations Anisotropy Radiation Symmetry Breaking |
| ISSN号 | 1475-7516 |
| 英文摘要 | We calculate the contribution of fluctuations with a thermal origin to the inflationary non-Gaussianity. We find that even a small component of radiation can lead to a large non-Gaussianity. We show that this thermal non-Gaussianity always has positive f(NL). We illustrate our result in the chain inflation model and the very weakly dissipative warm inflation model. We show that f(NL) similar to O(1) is general in such models. If we allow a modified equation of state, or some decoupling effects, a large thermal non-Gaussianity of order f(NL) > 5 or even f(NL) similar to 100 can be produced. We also show that the power spectrum of chain inflation should have a thermal origin. In the appendix, we give a clarification on the different conventions used in the literature related to the calculation of f(NL). |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000257167500014 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5547]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Chen, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Bin,Wang, Yi,Xue, Wei,et al. Inflationary non-Gaussianity from thermal fluctuations[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2008(5):-. |
| APA | Chen, Bin,Wang, Yi,Xue, Wei,&Chen, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.(2008).Inflationary non-Gaussianity from thermal fluctuations.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),-. |
| MLA | Chen, Bin,et al."Inflationary non-Gaussianity from thermal fluctuations".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2008):-. |
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。