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Probing inflation and dark energy with current cosmological observations
Xia JQ(夏俊卿); Zhao GB(赵公博); Zhang XM(张新民); Xia, JQ; Zhao, GB; Feng, B; Zhang, XM
2006
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号9页码:15
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; Univ Tokyo, RESCEU, Grad Sch Sci, Tokyo 1130033, Japan
文章类型Article
摘要It is commonly believed that our Universe has experienced at least two different stages of accelerated expansion. The early stage is known as inflation and the current acceleration is driven by dark energy. Observing inflation and dark energy dynamics are among the most important aspects of current cosmological research. In this paper we carry out a first detailed probe of the possible degeneracies between dynamical inflation and dark energy in the light of the current cosmological observations. We have combined type Ia supernova (Riess 'gold' samples), galaxy clustering (SDSS 3D power spectra) and the Wilkinson Microwave Anisotropy Probe (WMAP) observations and performed a global analysis using the Markov chain Monte Carlo method. We find the inclusion of inflation and dark energy parameters together makes the parameter spaces broader and the degeneracies among the inflation dark energy parameters are non-trivial: the allowed/preferred behaviour of dynamics in one sector is dependent on the prior of the other sector. Interestingly a deviation from a scale invariant primordial spectrum is slightly preferred by the current cosmological observations when one marginalizes over dynamical dark energy models.
关键词dark energy theory inflation
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1088/1475-7516/2006/09/015
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000242449600015
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240360
专题粒子天体物理中心
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,Zhang XM,et al. Probing inflation and dark energy with current cosmological observations[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2006(9):15.
APA 夏俊卿.,赵公博.,张新民.,Xia, JQ.,Zhao, GB.,...&Zhang, XM.(2006).Probing inflation and dark energy with current cosmological observations.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),15.
MLA 夏俊卿,et al."Probing inflation and dark energy with current cosmological observations".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2006):15.
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