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New generalized Chaplygin gas as a scheme for unification of dark energy and dark matter
Zhang X(张欣); Wu FQ(吴锋泉); Zhang, X; Wu, FQ; Zhang, JF
2006
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号1页码:3
通讯作者CCAST, World Lab, Beijing 100080, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China
文章类型Article
摘要We propose in this paper a new model for describing the unification of dark energy and dark matter. This new model is a further generalization of the generalized Chaplygin gas (GCG) model, thus dubbed new generalized Chaplygin gas (NGCG) model. The equation of state of the NGCG is given by p = -(A) over cap (a)/p(alpha), where a is the scale factor and (A) over cap (a) = - w(X)Aa(-3(1+ wX)(1+ a)). We show that the NGCG model is totally dual to an interacting XCDM parametrization scenario, in which the interaction between dark energy and dark matter is characterized by the constant a. We discuss the cosmological consequences led by such a unified dark sector model. Furthermore, we perform a state under analysis on this scenario and show the discrimination between this scenario and other dark energy models. Finally, a combined analysis of the data of type Ia supernovae, cosmic microwave background, and large scale structure provides a fairly tight constraint on the parameters of the NGCG model.
关键词dark matter dark energy theory supernova type Ia
学科领域Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2005/01/003
URL查看原文
语种英语
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000235045400024
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240344
专题理论物理室
作者单位中国科学院高能物理研究所
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Zhang X,Wu FQ,Zhang, X,et al. New generalized Chaplygin gas as a scheme for unification of dark energy and dark matter[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2006(1):3.
APA 张欣,吴锋泉,Zhang, X,Wu, FQ,&Zhang, JF.(2006).New generalized Chaplygin gas as a scheme for unification of dark energy and dark matter.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(1),3.
MLA 张欣,et al."New generalized Chaplygin gas as a scheme for unification of dark energy and dark matter".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .1(2006):3.
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