f(G;
T) gravity;
acceleration;
equation of state;
ENERGY CONDITIONS;
STRUCTURE SCALARS;
COMPACT STARS;
DYNAMICS;
FLUIDS;
D O I:
10.1139/cjp-2023-0200
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
A coupled formulation of the Gauss-Bonnet invariant term G and the energy-momentum trace T term, which provide a modified f(G, T) gravity, has been analyzed in this study. The functional form for the f(G, T) gravity has been taken as f(G, T) = alpha T + beta Gn, where alpha and beta are free parameters. The field equations are produced in general, which then used a dust case to extract a novel Hubble parameter. The stability of the assumed model and explanation for the late-time acceleration have been studied by the energy bound. Furthermore, the dynamical variables are used to analyze the behavior of the equation of state parameter by restricting different parameters with respect to the recent observational data. A quintessence-like evolution has been achieved as a result of this study.
机构:
Tomsk State Pedagog Univ, Tomsk 634061, Russia
Natl Res Tomsk State Univ, Tomsk 634050, RussiaTomsk State Pedagog Univ, Tomsk 634061, Russia
De Laurentis, Mariafelicia
Paolella, Mariacristina
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机构:
Univ Naples Federico II, Dipartimento Fis, I-80126 Naples, Italy
Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, ItalyTomsk State Pedagog Univ, Tomsk 634061, Russia
Paolella, Mariacristina
Capozziello, Salvatore
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机构:
Univ Naples Federico II, Dipartimento Fis, I-80126 Naples, Italy
Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy
Gran Sasso Sci Inst INFN, I-67100 Laquila, ItalyTomsk State Pedagog Univ, Tomsk 634061, Russia
机构:
Univ Fed Espirito Santo UFES, Ave Fernando Ferrari S-N, BR-29075910 Vitoria, BrazilUniv Fed Espirito Santo UFES, Ave Fernando Ferrari S-N, BR-29075910 Vitoria, Brazil
Velten, Hermano
Carames, Thiago R. P.
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h-index: 0
机构:
Univ Fed Espirito Santo UFES, Ave Fernando Ferrari S-N, BR-29075910 Vitoria, BrazilUniv Fed Espirito Santo UFES, Ave Fernando Ferrari S-N, BR-29075910 Vitoria, Brazil