NEUTRINO VISCOSITY AND ISOTROPIZATION OF BIANCHI TYPE-VIII AND TYPE-IX COSMOLOGICAL MODELS

被引：2

作者：

CADERNI, N ^{[1
]}

FABBRI, R ^{[1
]}

机构：

[1] UNIV FLORENCE,IST FIS SUPER,I-50121 FLORENCE,ITALY

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS | 1979年 / 51卷 / 02期

关键词：

D O I：

10.1007/BF02743431

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the isotropization of Bianchi type-VIII and type-IX spaces due to neutrino viscosity. We find that, owing to a peculiar coupling between curvature and anisotropy, neutrino viscosity does not guarantee the present-day isotropy of the cosmological expansion in such spaces. The observed isotropy of the background radiation imposes stringent limits either on the initial anisotropy or on the curvature of space, in contrast with the principle of chaotic cosmology. On the other hand, the amplification of the radiation entropy depends weakly on curvature and may be as large as 1012. © 1979 Società Italiana di Fisica.

引用

页码：201 / 221

页数：21

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[11] WHY IS UNIVERSE ISOTROPIC [J].