期刊
EUROPEAN PHYSICAL JOURNAL C
卷 67, 期 1-2, 页码 295-310出版社
SPRINGER
DOI: 10.1140/epjc/s10052-010-1292-8
关键词
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资金
- National Science Council [NSC-95-2112-M-007-059-MY3, NSC-98-2112-M-007-008-MY3]
- National Tsing Hua University [97N2309F1]
- MEC (Spain) [FIS2006-02842]
- AGAUR (Catalonia) [2009SGR-994]
- JSPS Visitor Program (Japan)
- INFN (Trento)-CSIC (Barcelona)
- ICREA Funding Source: Custom
We study all four types of finite-time future singularities emerging in the late-time accelerating (effective quintessence/phantom) era from F(R,G)-gravity, where R and G are the Ricci scalar and the Gauss-Bonnet invariant, respectively. As an explicit example of F(R,G)-gravity, we also investigate modified Gauss-Bonnet gravity, so-called F(G)-gravity. In particular, we reconstruct the F(G)-gravity and F(R,G)-gravity models where accelerating cosmologies realizing the finite-time future singularities emerge. Furthermore, we discuss a possible way to cure the finite-time future singularities in F(G)-gravity and F(R,G)-gravity by taking into account higher-order curvature corrections. The example of non-singular realistic modified Gauss-Bonnet gravity is presented. It turns out that adding such non-singular modified gravity to singular Dark Energy makes the combined theory a non-singular one as well.
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