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Dark energy constraints from the cosmic age and supernova
Feng B(冯波); Wang XL(王秀莲); Zhang XM(张新民); Feng, B; Wang, XL; Zhang, XM
Source PublicationPHYSICS LETTERS B
Corresponding AuthorFeng, B (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China.
AbstractUsing 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.
Subject AreaPhysics
Indexed BySCI
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000226817500005
Citation statistics
Cited Times:894[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Feng B,Wang XL,Zhang XM,et al. Dark energy constraints from the cosmic age and supernova[J]. PHYSICS LETTERS B,2005,607(1-2):#REF!.
APA 冯波,王秀莲,张新民,Feng, B,Wang, XL,&Zhang, XM.(2005).Dark energy constraints from the cosmic age and supernova.PHYSICS LETTERS B,607(1-2),#REF!.
MLA 冯波,et al."Dark energy constraints from the cosmic age and supernova".PHYSICS LETTERS B 607.1-2(2005):#REF!.
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