Toward a direct measurement of the cosmic acceleration: roadmap and forecast on FAST
文献类型：期刊论文
| 作者 | Jiao, Kang2; Zhang, Jian-Chen2,3,4; Zhang, Tong-Jie2,3; Yu, Hao-Ran5; Zhu, Ming6; Li, Di1,7
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 出版日期 | 2020 |
| 期号 | 1页码:13 |
| 关键词 | dark energy experiments intergalactic media |
| ISSN号 | 1475-7516 |
| DOI | 10.1088/1475-7516/2020/01/054 |
| 英文摘要 | HI absorption systems are great targets for direct measurement of the Sandage-Loeb (SL) effect throughout a wide range of redshift for ground-based radio telescopes. We demonstrate the significance of improving the accuracy of SL effect measurement in cosmological model selection. With its wide sky coverage and high sensitivity, we forecast that for 1 year of the upcoming commensal survey (CRAFTS) the FAST telescope is capable of discovering about 800 HI absorption systems thereby improving the SL measurement accuracy. Aiming to measurement the cosmic redshift drift rate at the precision of <(z)over dot> similar to 10(-10) decade(-1), we propose combined observation mode with blind-searching and targeted observation. For a decade of consecutive targeted spectroscopic observation with the frequency resolution at a level of sub-0.1 Hz, we could detect the first-order derivative of the cosmological redshift with the expected precision. |
| WOS关键词 | REDSHIFT ; RADIO ; DECELERATION ; EVOLUTION ; UNIVERSE ; GAS |
| 资助项目 | National Key R&D Program of China[2017YFA0402600] ; National Science Foundation of China[11929301] ; National Science Foundation of China[11573006] ; National Science Foundation of China[11725313] ; National Science Foundation of China[11690024] ; CAS International Partnership Program[114A11KYSB20160008] |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000528025800055 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Science Foundation of China ; National Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55071]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Jiao, Kang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Dezhou Univ, Inst Astron Sci, Dezhou 253023, Peoples R China 4.Dezhou Univ, Coll Automot Engn, Dezhou 253023, Peoples R China 5.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 6.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 7.Chinese Acad Sci, CAS Key Lab Fast, NAOC, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiao, Kang,Zhang, Jian-Chen,Zhang, Tong-Jie,et al. Toward a direct measurement of the cosmic acceleration: roadmap and forecast on FAST[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2020(1):13. |
| APA | Jiao, Kang,Zhang, Jian-Chen,Zhang, Tong-Jie,Yu, Hao-Ran,Zhu, Ming,&Li, Di.(2020).Toward a direct measurement of the cosmic acceleration: roadmap and forecast on FAST.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(1),13. |
| MLA | Jiao, Kang,et al."Toward a direct measurement of the cosmic acceleration: roadmap and forecast on FAST".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .1(2020):13. |
入库方式： OAI收割
来源：国家天文台
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