Impact of the local void on the cosmological parameters
文献类型：期刊论文
| 作者 | Yu, Bo1,2
|
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 0期号:3页码:4PP |
| 关键词 | dark energy theory supernova type Ia - standard candles |
| ISSN号 | 1475-7516 |
| 通讯作者 | Yu, B (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: yubo@pmo.ac.cn |
| 英文摘要 | In this paper, I discuss the effects of a local void on the cosmological parameters. It is found that, if the supernova distance is absolutely calibrated, then the bias of all the cosmological parameters is always important, while if the supernova distance is relatively calibrated, the largest effects will appear in the dark energy equation of state. For a local void of size similar to 100Mpc, the bias effects mainly manifest in the low redshift range. Therefore, the piecewise dark energy equation of state, especially the one in the range of lowest redshift, will be more strongly affected than the constant equation of state. In order to reduce this bias in constraining the cosmological parameters, one could require the distance of all the adopted supernovas be greater than 1.2 similar to 1.5 times of the radius of the local void. In this case, the residual bias can be safely ignored. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics, Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 关键词[WOS] | IA SUPERNOVAE ; HUBBLE-BUBBLE ; DARK ENERGY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000316989200014 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9909]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Bo. Impact of the local void on the cosmological parameters[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013,0(3):4PP. |
| APA | Yu, Bo.(2013).Impact of the local void on the cosmological parameters.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,0(3),4PP. |
| MLA | Yu, Bo."Impact of the local void on the cosmological parameters".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 0.3(2013):4PP. |
入库方式： OAI收割
来源：紫金山天文台
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