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Dark energy constraints from the cosmic age and supernova
Feng, B; Wang, XL; Zhang, XM; Feng, B , Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China.
2005
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号607期号:40910页码:35-41
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.
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
关键词Globular-cluster Messier-4 Flux-averaging Analysis Equation-of-state Cosmological Constant Universe Consequences Distances Sequence Density Matter
学科领域Physics
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收录类别SCI
WOS记录号WOS:000226817500005
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被引频次:871[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/311006/13881
专题理论物理所1978-2010年知识产出
通讯作者Feng, B , Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China.
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Feng, B,Wang, XL,Zhang, XM,et al. Dark energy constraints from the cosmic age and supernova[J]. PHYSICS LETTERS B,2005,607(40910):35-41.
APA Feng, B,Wang, XL,Zhang, XM,&Feng, B , Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China..(2005).Dark energy constraints from the cosmic age and supernova.PHYSICS LETTERS B,607(40910),35-41.
MLA Feng, B,et al."Dark energy constraints from the cosmic age and supernova".PHYSICS LETTERS B 607.40910(2005):35-41.
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