A COMPARATIVE ANALYSIS OF THE SUPERNOVA LEGACY SURVEY SAMPLE WITH Lambda CDM AND THE R-h = ct UNIVERSE
文献类型：期刊论文
| 作者 | Wei, Jun-Jie1,4; Wu, Xue-Feng1,5,6 ; Melia, Fulvio1,2,3; Maier, Robert S.7,8
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2015-03-01 |
| 卷号 | 149期号:3页码:102 |
| 关键词 | cosmic background radiation cosmological parameters cosmology: observations cosmology: theory distance scale supernovae: general |
| 英文摘要 | The use of Type Ia supernovae (SNe Ia) has thus far produced the most reliable measurement of the expansion history of the universe, suggesting that Lambda CDM offers the best explanation for the redshift-luminosity distribution observed in these events. However, analysis of other kinds of sources, such as cosmic chronometers, gamma-ray bursts, and high-z quasars, conflicts with this conclusion, indicating instead that the constant expansion rate implied by the R-h = ct universe is a better fit to the data. The central difficulty with the use of SNe Ia as standard candles is that one must optimize three or four nuisance parameters characterizing supernova (SN) luminosities simultaneously with the parameters of an expansion model. Hence, in comparing competing models, one must reduce the data independently for each. We carry out such a comparison of Lambda CDM and the R-h = ct universe using the SN Legacy Survey sample of 252 SN events, and show that each model fits its individually reduced data very well. However, since R-h = ct has only one free parameter (the Hubble constant), it follows from a standard model selection technique that it is to be preferred over Lambda CDM, the minimalist version of which has three (the Hubble constant, the scaled matter density, and either the spatial curvature constant or the dark energy equation-of-state parameter). We estimate using the Bayes Information Criterion that in a pairwise comparison, the likelihood of R-h = ct is similar to 90%, compared with only similar to 10% for a minimalist form of Lambda CDM, in which dark energy is simply a cosmological constant. Compared to R-h = ct, versions of the standard model with more elaborate parametrizations of dark energy are judged to be even less likely. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HUBBLE-SPACE-TELESCOPE ; GAMMA-RAY BURSTS ; SUPERMASSIVE BLACK-HOLES ; EQUATION-OF-STATE ; IA SUPERNOVAE ; COSMOLOGICAL PARAMETERS ; COSMIC CHRONOMETERS ; GALAXY CLUSTERS ; PEAK LUMINOSITY ; REDSHIFT 6 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000352304000013 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14889]  |
| 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.Univ Arizona, Dept Phys, Program Appl Math, Tucson, AZ 85721 USA 3.Univ Arizona, Dept Astron, Tucson, AZ 85721 USA 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China 6.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China 7.Univ Arizona, Dept Math, Stat Program, Tucson, AZ 85721 USA 8.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA |
| 推荐引用方式 GB/T 7714 | Wei, Jun-Jie,Wu, Xue-Feng,Melia, Fulvio,et al. A COMPARATIVE ANALYSIS OF THE SUPERNOVA LEGACY SURVEY SAMPLE WITH Lambda CDM AND THE R-h = ct UNIVERSE[J]. ASTRONOMICAL JOURNAL,2015,149(3):102. |
| APA | Wei, Jun-Jie,Wu, Xue-Feng,Melia, Fulvio,&Maier, Robert S..(2015).A COMPARATIVE ANALYSIS OF THE SUPERNOVA LEGACY SURVEY SAMPLE WITH Lambda CDM AND THE R-h = ct UNIVERSE.ASTRONOMICAL JOURNAL,149(3),102. |
| MLA | Wei, Jun-Jie,et al."A COMPARATIVE ANALYSIS OF THE SUPERNOVA LEGACY SURVEY SAMPLE WITH Lambda CDM AND THE R-h = ct UNIVERSE".ASTRONOMICAL JOURNAL 149.3(2015):102. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。