Features in the dark energy equation of state and modulations in the Hubble diagram
Xia JQ(夏俊卿); Zhao GB(赵公博); Li H(李虹); Zhang XM(张新民); Xia, JQ; Zhao, GB; Li, H; Feng, B; Zhang, XM
刊名PHYSICAL REVIEW D
2006
卷号74期号:8页码:83521
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.74.083521
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Tokyo 1130033, Japan
文章类型Review
英文摘要We probe the time dependence of the dark energy equation of state (EOS) in light of three-year WMAP (WMAP3) and the combination with other tentative cosmological observations from galaxy clustering (SDSS) and Type Ia Supernova (SNIa). We mainly focus on cases where the EOS is oscillating or with local bumps. By performing a global analysis with the Markov Chain Monte Carlo (MCMC) method, we find the current observations, in particular, the WMAP3 + SDSS data combination, allow large oscillations of the EOS which can leave oscillating features on the (residual) Hubble diagram, and such oscillations are potentially detectable by future observations like SNAP, or even by the currently ongoing SNIa observations. Local bumps of dark energy EOS can also leave imprints on CMB, LSS and SNIa. In cases where the bumps take place at low redshifts and the effective EOS is close to -1, CMB and LSS observations cannot give stringent constraints on such possibilities. However, geometrical observations like (future) SNIa can possibly detect such features. On the other hand when the local bumps take place at higher redshifts beyond the detectability of SNIa, future precise observations like Gamma-ray bursts, CMB and LSS may possibly detect such features. In particular, we find that bumplike dark energy EOS on high redshifts might be responsible for the localized features of WMAP on ranges l similar to 20-40, which is interesting and deserves addressing further.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000241724000038
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240820
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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Xia JQ,Zhao GB,Li H,et al. Features in the dark energy equation of state and modulations in the Hubble diagram[J]. PHYSICAL REVIEW D,2006,74(8):83521.
APA 夏俊卿.,赵公博.,李虹.,张新民.,Xia, JQ.,...&Zhang, XM.(2006).Features in the dark energy equation of state and modulations in the Hubble diagram.PHYSICAL REVIEW D,74(8),83521.
MLA 夏俊卿,et al."Features in the dark energy equation of state and modulations in the Hubble diagram".PHYSICAL REVIEW D 74.8(2006):83521.
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