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题名: Dark energy constraints from the cosmic age and supernova
作者: Feng, B ;  Wang, XL ;  Zhang, XM
刊名: PHYSICS LETTERS B
出版日期: 2005
卷号: 607, 期号:40910, 页码:35-41
关键词: GLOBULAR-CLUSTER MESSIER-4 ;  FLUX-AVERAGING ANALYSIS ;  EQUATION-OF-STATE ;  COSMOLOGICAL CONSTANT ;  UNIVERSE ;  CONSEQUENCES ;  DISTANCES ;  SEQUENCE ;  DENSITY ;  MATTER
学科分类: Physics
通讯作者: Feng, B , Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China.
部门归属: Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: Using the low limit of cosmic ages from globular cluster and the white dwarfs: t(0) > 12 Gyr, together with recent new high redshift supernova observations from the HST/GOODS program and previous supernova data, we give a considerable estimation of the equation of state for dark energy, with uniform priors as weak as 0.2 < Omega(m) < 0.4 or 0.1 < Omega(m)h(2) < 0.16. We find cosmic age limit plays a significant role in lowering the upper bound on the variation amplitude of dark energy equation of state. We propose in this Letter a new scenario of dark energy dubbed quintom, which gives rise to the equation of state larger than -1 in the past and less than -1 today, satisfying current observations. In addition we have also considered the implications of recent X-ray gas mass fraction data on dark energy, which favors a negative running of the equation of state. (C) 2004 Elsevier B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000226817500005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13881
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Feng, B,Wang, XL,Zhang, XM. Dark energy constraints from the cosmic age and supernova[J]. PHYSICS LETTERS B,2005,607(40910):35-41.
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