Recovering the effective cosmological constant in extended gravity theories

被引：45

作者：

Capozziello, S ^{[1
]}

de Ritis, R

Marino, AA

机构：

[1] Univ Salerno, Dipartimento Sci Fis ER Caianiello, I-84081 Baronissi, Italy

[2] Univ Naples Federico II, Dipartimento Sci Fis, I-80138 Naples, Italy

[3] Ist Nazl Fis Nucl, I-80125 Naples, Italy

[4] Osserv Astron Capodimonte, I-80131 Naples, Italy

来源：

GENERAL RELATIVITY AND GRAVITATION | 1998年 / 30卷 / 08期

关键词：

inflationary modes; higher-order gravity;

D O I：

10.1023/A:1026651129626

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the framework of extended gravity theories, we discuss the meaning of a time-dependent "cosmological constant" and give a set of conditions to recover an asymptotic de Sitter behaviour for a class of cosmological models independently of initial data. To this purpose we introduce a time-dependent (effective) quantity which asymptotically becomes the true cosmological constant. We will deal with scalar-tensor, fourth and higher than fourth-order theories.

引用

页码：1247 / 1272

页数：26

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