theeffectsofparametrizationofthedarkenergyequationofstate
文献类型：期刊论文
| 作者 | Ke Shi1; Huang Yongfeng1; Tan Lu2
|
| 刊名 | researchinastronomyandastrophysics
 |
| 出版日期 | 2011 |
| 卷号 | 011期号:012页码:1403 |
| ISSN号 | 1674-4527 |
| 英文摘要 | We investigate in detail the influence of parametrizations of the dark energy equation of state on reconstructing dark energy geometrical parameters, such as the deceleration parameter q（z） and Om diagnostic. We use a type Ia supernova sample, baryon acoustic oscillation data, cosmic microwave background information along with twelve observational Hubble data points to constrain cosmological parameters. With the joint analysis of these current datasets, we find that the parametrizations of w（z） have little influence on the reconstruction result of q（z） and Ore. The same is true for the transition （cosmic deceleration to acceleration） redshift zt, for which we find that for different parametrizations of w（z）, the best fitted values of zt are very close to each other （about 0.65）. All of our results are in good agreement with the ACDM model. Furthermore, using the combination of datasets, we do not find any signal of decreasing cosmic acceleration as suggested in some recent papers. The results suggest that the influence of the prior w（z） is not as severe as one may anticipate, and thus we can, to some extent, safely use a reasonable parametrization of w（z） to reconstruct some other dark energy parameters （e.g. q（z）, Ore） with a combination of datasets. |
| 语种 | 英语 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/29650]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.南京大学 2.中国科学院紫金山天文台 |
| 推荐引用方式 GB/T 7714 | Ke Shi,Huang Yongfeng,Tan Lu. theeffectsofparametrizationofthedarkenergyequationofstate[J]. researchinastronomyandastrophysics,2011,011(012):1403. |
| APA | Ke Shi,Huang Yongfeng,&Tan Lu.(2011).theeffectsofparametrizationofthedarkenergyequationofstate.researchinastronomyandastrophysics,011(012),1403. |
| MLA | Ke Shi,et al."theeffectsofparametrizationofthedarkenergyequationofstate".researchinastronomyandastrophysics 011.012(2011):1403. |
入库方式： OAI收割
来源：紫金山天文台
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