Unified Description of Dark Energy and Dark Matter within the Generalized Hybrid Metric-Palatini Theory of Gravity

被引：22
作者：
Sa, Paulo M. [1 ]
机构：
[1] Univ Algarve, Fac Ciencias & Tecnol, Dept Fis, Campus Gambelas, P-8005139 Faro, Portugal
来源：
UNIVERSE | 2020年 / 6卷 / 06期
关键词：
modified gravity; dark matter; dark energy; INFLATION;
D O I：
10.3390/universe6060078
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The generalized hybrid metric-Palatini theory of gravity admits a scalar-tensor representation in terms of two interacting scalar fields. We show that, upon an appropriate choice of the interaction potential, one of the scalar fields behaves like dark energy, inducing a late-time accelerated expansion of the universe, while the other scalar field behaves like pressureless dark matter that, together with ordinary baryonic matter, dominates the intermediate phases of cosmic evolution. This unified description of dark energy and dark matter gives rise to viable cosmological solutions, which reproduce the main features of the evolution of the universe.
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页数：13
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