ITP OpenIR  > 理论物理所2014年知识产出
Investigating the possibility of a turning point in the dark energy equation of state
Hu, YZ; Li, M; Li, X; Zhang, ZH; Li, X (reprint author), Korea Inst Adv Study, Hoegiro 87, Seoul 130722, South Korea.
2014
发表期刊SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
卷号57期号:8页码:1607-1612
摘要We investigate a second order parabolic parametrization, w(a) = W-t + w(a)(a(t) - a)(2), which is a direct characterization of a possible turning in w. The cosmological consequence of this parametrization is explored by using the observational data of the SNLS3 type Ia supernovae sample, the CMB measurements from WMAP9 and Planck, the Hubble parameter measurement from HST, and the baryon acoustic oscillation (BAO) measurements from 6dFGS, BOSS DR11 and improved WiggleZ. We found the existence of a turning point in w at a similar to 0.7 is favored at l sigma CL. In the epoch 0.55 < a < 0.9, w < -1 is favored at 1 sigma CL, and this significance increases near a = 0.8, reaching a 2 sigma CL. The parabolic parametrization achieve equivalent performance to the ACDM and Chevallier-Polarski-Linder (CPL) models when the Akailce information criterion was used to assess them. Our analysis shows the value of considering high order parametrizations when studying the cosmological constraints on w.
部门归属[Hu YaZhou ; Li Miao ; Zhang ZhenHui] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China ; [Hu YaZhou ; Zhang ZhenHui] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China ; [Li Miao] Sun Yat Sen Univ, Sch Astron & Space Sci, Guangzhou 510275, Guangdong, Peoples R China ; [Li XiaoDong] Korea Inst Adv Study, Seoul 130722, South Korea
关键词Baryon Acoustic-oscillations Cosmological Constant Accelerating Universe Hubble Constant Ia Supernovae Constraints Distance Lambda Matter Peak
学科领域Physics
资助者National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program
DOI10.1007/s11433-014-5497-y
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收录类别SCI
语种英语
资助者National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program ; National Natural Science Foundation of China [11275247, 11335012]; KDES program
WOS记录号WOS:000339365800025
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15696
专题理论物理所2014年知识产出
通讯作者Li, X (reprint author), Korea Inst Adv Study, Hoegiro 87, Seoul 130722, South Korea.
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GB/T 7714
Hu, YZ,Li, M,Li, X,et al. Investigating the possibility of a turning point in the dark energy equation of state[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(8):1607-1612.
APA Hu, YZ,Li, M,Li, X,Zhang, ZH,&Li, X .(2014).Investigating the possibility of a turning point in the dark energy equation of state.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(8),1607-1612.
MLA Hu, YZ,et al."Investigating the possibility of a turning point in the dark energy equation of state".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.8(2014):1607-1612.
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