Matching torsion A-term with observations

被引：16

作者：

Capozziello, S

Cardone, VF

Piedipalumbo, E

Sereno, M

Troisi, A

机构：

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

[2] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy

[3] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2003年 / 12卷 / 03期

关键词：

D O I：

10.1142/S0218271803003074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Taking into account a torsion field gives rise to a negative pressure contribution in cosmological dynamics and then to an accelerated behaviour of Hubble fluid. The presence of torsion has the same effect as a A-term. We obtain a general exact solution which well fits data coming from high redshift supernovae and Sunyaev-Zeldovich/X-ray method for the determination of cosmological parameters. On the other hand, it is possible to obtain observational constraints on the amount of torsion density. A dust dominated Friedmann behaviour is recovered as soon as torsion effects are not relevant.

引用

页码：381 / 394

页数：14

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