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Probing for dynamics of dark energy and curvature of universe with latest cosmological observations
Zhao GB(赵公博); Xia JQ(夏俊卿); Zhao, GB; Xia, JQ; Li, H; Tao, C; Virey, JM; Zhu, ZH; Zhang, XM; Zhang XM(张新民)
2007
Source PublicationPHYSICS LETTERS B
Volume648Issue:1Pages:8-13
Corresponding AuthorZhao, GB (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
SubtypeArticle
AbstractWe use the newly released 182 type la supernova data combined with the third-year Wilkinson Microwave Anisotropic Probe data (WMAP3) and large scale structure (LSS) information including SDSS and 2dFGRS to constrain the dark energy equation of state (EoS) as well as the curvature of universe Omega(K). Using the full dataset of Cosmic Microwave Background (CMB) and LSS rather than the shift parameter and linear growth factor, we make a Markov Chain Monte Carlo (MCMC) global fit, while paying particular attention to the dark energy perturbation. Parameterizing the EoS as w(DE)(a) = w(0)+w(1)(1-a), we find the best fit of (w(0), w(1)) is(-1.053, 0.944) and for W-DE(a) = w(0)+w(1) sin(3/2 pi ln(a)), the best fit for (w(0), w(1)) is (- 1.614, -1.046)). We find that a flat universe is a good approximation, namely, \Omega(K)\ > 0.06 has been excluded by 2 sigma yet the inclusion of Omega(K) can affect the measurement of DE parameters owing to their correlation and the present systematic effects of SNIa measurements. (c) 2007 Elsevier B.V. All rights reserved.
Subject AreaPhysics
DOI10.1016/j.physletb.2007.02.070
Indexed BySCI ; INSPIREHEP ; ADS
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000246376700002
ADS Bibcode2007PhLB..648....8Z
ADS URLhttps://ui.adsabs.harvard.edu/abs/2007PhLB..648....8Z
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2007PhLB..648....8Z/citations
inspireid735573
inspireURLhttps://inspirehep.net/literature/735573
Citation statistics
Cited Times:104 [INSPIRE]
Cited Times:112 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225468
Collection理论物理室
粒子天体物理中心
Recommended Citation
GB/T 7714
Zhao GB,Xia JQ,Zhao, GB,et al. Probing for dynamics of dark energy and curvature of universe with latest cosmological observations[J]. PHYSICS LETTERS B,2007,648(1):8-13.
APA 赵公博.,夏俊卿.,Zhao, GB.,Xia, JQ.,Li, H.,...&张新民.(2007).Probing for dynamics of dark energy and curvature of universe with latest cosmological observations.PHYSICS LETTERS B,648(1),8-13.
MLA 赵公博,et al."Probing for dynamics of dark energy and curvature of universe with latest cosmological observations".PHYSICS LETTERS B 648.1(2007):8-13.
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