The ergodicity bias in the observed galaxy distribution
文献类型：期刊论文
| 作者 | Pan, Jun1; Zhang, Pengjie2 |
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2010-08-01 |
| 卷号 | 8期号:8页码:019' |
| 关键词 | redshift surveys cosmological parameters from LSS baryon acoustic oscillations |
| ISSN号 | 1475-7516 |
| 英文摘要 | The spatial distribution of galaxies we observed is subject to the given condition that we, human beings are sitting right in a galaxy-the Milky Way. Thus the ergodicity assumption is questionable in interpretation of the observed galaxy distribution. The resultant difference between observed statistics (volume average) and the true cosmic value (ensemble average) is termed as the ergodicity bias. We perform explicit numerical investigation of the effect for a set of galaxy survey depths and near-end distance cuts. It is found that the ergodicity bias in observed two-and three-point correlation functions in most cases is insignificant for modern analysis of samples from galaxy surveys and thus close a loophole in precision cosmology. However, it may become non-negligible in certain circumstances, such as those applications involving three-point correlation function at large scales of local galaxy samples. Thus one is reminded to take extra care in galaxy sample construction and interpretation of the statistics of the sample, especially when the characteristic redshift is low. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 关键词[WOS] | LARGE-SCALE STRUCTURE ; DIGITAL SKY SURVEY ; LUMINOSITY ; DEPENDENCE ; COLORS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000283575000021 |
| 公开日期 | 2011-11-23 |
| 源URL | [http://159.226.72.40/handle/332002/1193]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Purple Mt Observ, Nanjing 210008, Peoples R China 2.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pan, Jun,Zhang, Pengjie. The ergodicity bias in the observed galaxy distribution[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010,8(8):019'. |
| APA | Pan, Jun,&Zhang, Pengjie.(2010).The ergodicity bias in the observed galaxy distribution.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,8(8),019'. |
| MLA | Pan, Jun,et al."The ergodicity bias in the observed galaxy distribution".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 8.8(2010):019'. |
入库方式： OAI收割
来源：紫金山天文台
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