Is the cosmic ultraviolet background fluctuating at redshift z similar or equal to 6?
文献类型：期刊论文
| 作者 | Liu, Jiren ; Bi, Hongguang; Feng, Long-Long; Fang, Li-Zhi
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 645期号:1页码:L1-L4 |
| 关键词 | cosmology : theory early universe intergalactic medium |
| 英文摘要 | We study the Gunn-Peterson effect of the photoionized intergalactic medium (IGM) in the redshift range using semianalytic simulations based on the lognormal model. Assuming a rapidly evolved and spatially 5 < z < 6.4 uniform ionizing background, the simulation can produce all the observed abnormal statistical features near redshift. They include (1) a rapid increase of absorption depths, (2) large scatter in the optical depths, z similar or equal to 6 (3) long-tailed distributions of transmitted flux, and (4) long dark gaps in spectra. These abnormal features are mainly due to rare events, which correspond to the long-tailed probability distribution of the IGM density field, and therefore they may not imply significant spatial fluctuations in the UV ionizing background at z similar or equal to 6. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000238833100001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7107]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Purple Mt Observ, Nanjing 210008, Peoples R China 2.Univ Sci & Technol China, Ctr Astrophys, Anhua 230026, Peoples R China 3.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jiren,Bi, Hongguang,Feng, Long-Long,et al. Is the cosmic ultraviolet background fluctuating at redshift z similar or equal to 6?[J]. ASTROPHYSICAL JOURNAL,2006,645(1):L1-L4. |
| APA | Liu, Jiren,Bi, Hongguang,Feng, Long-Long,&Fang, Li-Zhi.(2006).Is the cosmic ultraviolet background fluctuating at redshift z similar or equal to 6?.ASTROPHYSICAL JOURNAL,645(1),L1-L4. |
| MLA | Liu, Jiren,et al."Is the cosmic ultraviolet background fluctuating at redshift z similar or equal to 6?".ASTROPHYSICAL JOURNAL 645.1(2006):L1-L4. |
入库方式： OAI收割
来源：国家天文台
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