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题名: Dark side of the Universe after Planck data
作者: Cheng, C ;  Huang, QG
刊名: PHYSICAL REVIEW D
出版日期: 2014
卷号: 89, 期号:4, 页码:43003
关键词: BARYON ACOUSTIC-OSCILLATIONS ;  HUBBLE-SPACE-TELESCOPE ;  DIGITAL SKY SURVEY ;  CONSTANT ;  CONSTRAINTS ;  SUPERNOVAE ;  DISTANCE ;  SAMPLE ;  MATTER
学科分类: Physics
DOI: 10.1103/PhysRevD.89.043003
通讯作者: Cheng, C (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Cheng, Cheng; Huang, Qing-Guo] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Cheng, Cheng] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
英文摘要: Recently released Planck data imply a smaller Hubble constant H-0 than that from the Hubble Space Telescope project (HST) and a larger percentage of the matter components Omega(m) compared to the Supernova Legacy Survey (SNLS) in the. cold dark matter (CDM) model. In this paper we found that even though the tension on H-0 between Planck and HST can be relaxed if the dark radiation is introduced [Delta N-eff 0.536(-0.224)(-0.229) at 68% CL from the data sets of Planck + WMAP polarization (WP) + baryon acoustic oscillation (BAO) + the combination of supernova Union2.1 compilation of 580 Supernovae (Union2.1) + HST], Omega(m) from Planck is still not nicely compatible with that from SNLS. The tensions between Planck and other astrophysical data sets can be significantly relaxed in the wCDM model, and the combination of these data sets prefers a phantomlike dark energy at more than 95% CL: w -1.15 +/- 0.07 and w -1.16 +/- 0.06 at 68% CL from Planck + WP + BAO + Union2.1 + HST and Planck + WP + BAO + SNLS + HST, respectively. From the statistical point of view, there is no evidence for a time-evolving equation of state (Delta chi(2) -0.3 compared to a constant equation of state for the combination of Planck + WP + BAO + SNLS + HST).
资助者: NSFC [10821504, 11322545, 11335012]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000332164600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15478
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Cheng, C,Huang, QG. Dark side of the Universe after Planck data[J]. PHYSICAL REVIEW D,2014,89(4):43003.
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