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Huang, ZP; Wu, YL; Huang, ZP (reprint author), Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China.
Analysis on a general class of holographic type dark energy models
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
语种英语
关键词Cosmological Constant Inflationary Universe Infrared Cutoff Transition Supernovae Flatness Horizon Lambda
摘要We present a detail analysis on a general class of holographic type dark energy models characterized by the length scale L = 1/a(n)(t) integral(t)(0) dt' a(m) (t'). We show that n >= 0 is required by the recent cosmic accelerated expansion of universe. In the early universe dominated by the constituent with constant equation of state w(m), we have w(de) similar or equal to -1 - 2n/3 for n >= 0 and m < 0, and w(de) similar or equal to -2/3(n - m) + w(m) for n > m >= 0. The models with n > m >= 0 become single-parameter models like the Lambda CDM model due to the analytic feature Omega(de) similar or equal to d(2)/4(2m + 3w(m) + 3)(2)a(2(n-m)) at radiation-and matter-dominated epoch. Whereas the cases n = m >= 0 should be abandoned as the dark energy cannot dominate the universe forever and there might be too large fraction of dark energy in early universe, and the cases m > n >= 0 are forbidden by the self-consistent requirement Omega(de) << 1 in the early universe. Thus a detailed study on the single-parameter models corresponding to cases n > m >= 0 is carried out by using recent observations. The best-fit analysis indicates that the conformal-age-like models with n = m + 1, i.e. L proportional to 1/Ha in early universe, are more favored and also the models with smaller n for the given n - m are found to fit the observations better. The equation of state of the dark energy in models with n = m + 1 > 0 transits from w(de) < -1 during inflation to w(de) > -1 in radiation-and matter-dominated epoch, and then back to w(de) < -1 eventually. The best-fit result of the case (n = 0, m = -1) which is so-called eta HDE model proposed in [1] is the most favorable model and compatible with the Lambda CDM model.
2012
ISSN1475-7516
期号7页码:35
学科领域Physics
收录类别SCI
项目资助者National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016] ; National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016]
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15062
专题理论物理所科研产出_SCI论文
通讯作者Huang, ZP (reprint author), Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China.
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GB/T 7714
Huang, ZP,Wu, YL,Huang, ZP . Analysis on a general class of holographic type dark energy models[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(7):35.
APA Huang, ZP,Wu, YL,&Huang, ZP .(2012).Analysis on a general class of holographic type dark energy models.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(7),35.
MLA Huang, ZP,et al."Analysis on a general class of holographic type dark energy models".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .7(2012):35.
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