Emergent Universe as an interaction in the dark sector

被引：1
|
作者：
Marachlian, Emiliano [1 ,2 ]
Sanchez G, I. E. [1 ,3 ]
Santillan, Osvaldo P. [4 ]
机构：
[1] Univ Buenos Aires, FCEyN, Dept Fis, RA-1428 Buenos Aires, DF, Argentina
[2] IFIByNE CONICET, RA-1428 Buenos Aires, DF, Argentina
[3] Univ Buenos Aires, IFIBA, RA-1428 Buenos Aires, DF, Argentina
[4] Univ Buenos Aires, Dept Matemat, FCEyN, RA-1428 Buenos Aires, DF, Argentina
来源：
MODERN PHYSICS LETTERS A | 2017年 / 32卷 / 28期
关键词：
Emergent Universe; dark energy; interaction; ENERGY; VACUUM; CONSTRAINTS; SUPERNOVAE; EXPANSION; HISTORY; MATTER; MODEL;
D O I：
10.1142/S0217732317501528
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A cosmological scenario where dark matter interacts with a variable vacuum energy for a spatially flat FriedmannRobertsonWalker (FRW) spacetime is proposed and analyzed to show that with a linear equation of state and a particular interaction in the dark sector it is possible to get a model of an Emergent Universe. In addition, the viability of two particular models is studied by taking into account the recent observations. The updated observational Hubble data and the JLA supernovae data are used in order to constraint the cosmological parameters of the models and estimate the amount of dark energy in the radiation era. It is shown that the two models fulfil the severe bounds of Omega(x) (z similar or equal to 1100) < 0.009 at the 2 sigma level of Planck.
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页数：13
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