The variable cosmological constant and dynamics of dark energy

doi:10.1016/j.physletb.2009.08.064

	The variable cosmological constant and dynamics of dark energy
	Shao, Guo-yun 1,2; Liu, Yu-xin 1,2,3
刊名	PHYSICS LETTERS B
	2009-09-28
卷号	680 页码:199-204
关键词	Interacting dark energy Weak gravity conjecture
ISSN号	0370-2693
DOI	10.1016/j.physletb.2009.08.064
英文摘要	We study the variable cosmological constant model with the interaction between dark energy and matter. By constructing the dark energy component as an effective quintessence scalar field, we give an upper limit of parameter in with weak gravity conjecture which requires that the variation of the scalar field Delta phi should be less than the Planck mass M-p. On the other hand, we constrain the model parameters with recent type Ia supernovae and WMAP five-year observation, which gives a consistent result with weak gravity conjecture. The combination of these observational data restricts the model parameters within narrow ranges with Omega(m0) = 0.276(-0.017)(+0.020) 0 <= m <= 0.075, showing that weak interaction between dark energy and matter is favored in this model. The involving behaviors of relative densities Omega(m)(z). Omega(de)(z) and decelerated parameter q(z) are also Studied with the constrained parameters. (C) 2009 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[10425521] ; National Natural Science Foundation of China[10575004] ; National Natural Science Foundation of China[10675007] ; Major State Basic Research Development Program[G2007CB815000] ; Key Grant Project of Chinese Ministry of Education (CMOE)[305001]
WOS关键词	WEAK GRAVITY CONJECTURE ; DECAYING LAMBDA-COSMOLOGIES ; PROBE WMAP OBSERVATIONS ; HUBBLE-SPACE-TELESCOPE ; DIGITAL SKY SURVEY ; EQUATION-OF-STATE ; NONFLAT UNIVERSE ; QUINTOM MODEL ; VACUUM ENERGY ; CONSTRAINTS
WOS研究方向	Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000270618200001
资助机构	National Natural Science Foundation of China ; Major State Basic Research Development Program ; Key Grant Project of Chinese Ministry of Education (CMOE)
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/31164]
专题	中国科学院近代物理研究所
通讯作者	Shao, Guo-yun
作者单位	1.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Shao, Guo-yun,Liu, Yu-xin. The variable cosmological constant and dynamics of dark energy[J]. PHYSICS LETTERS B,2009,680:199-204.
APA	Shao, Guo-yun,&Liu, Yu-xin.(2009).The variable cosmological constant and dynamics of dark energy.PHYSICS LETTERS B,680,199-204.
MLA	Shao, Guo-yun,et al."The variable cosmological constant and dynamics of dark energy".PHYSICS LETTERS B 680(2009):199-204.