Sign-changeable interacting ghost dark energy model versus the cosmic age

被引:0
|
作者
Zarandi, H. R. M. [1 ]
Ebrahimi, E. [1 ,2 ]
机构
[1] Shahid Bahonar Univ Kerman, Coll Phys, POB 76175, Kerman, Iran
[2] Shiraz Univ, Phys Dept & Biruni Observ, Shiraz 71454, Iran
来源
关键词
Cosmic age; cosmological parameters; dark energy; HUBBLE-SPACE-TELESCOPE; COSMOLOGICAL CONSTANT; CONSTRAINTS; GALAXY; OLD; INSTABILITY; DISCOVERIES; SUPERNOVAE; QUASAR;
D O I
10.1142/S0218271822501218
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper, we discuss cosmic age problem in the case of ghost dark energy (GDE) model. To this end, we use two observational data sets to constrain the free parameter space of the models. Next, we try to set new limits on the mentioned free parameter space using the age of the universe. In this work, both of these tasks are done for the GDE model in the presence of the sign-changeable interaction terms. To this end, three classes of interaction terms are considered that provide a sign-changeability possibility. For one of these cases, the age problem passes completely and there is no new bound of free parameters. For two others the age test sets some constrains on the models. In addition to cosmic age problem, we investigate some other properties of these three models including ability to cross the phantom line, accelerating phase of cosmic expansion and the stability against cosmic perturbations.
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页数:26
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