Is there evidence for cosmic anisotropy in the polarization of distant radio sources?

被引：149

作者：

Carroll, SM ^{[1
]}

Field, GB ^{[1
]}

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.79.2394

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the polarization angle and orientation of cosmological radio sources may be used to search for unusual effects in the propagation of light through the Universe. Recently, Nodland and Ralston [Phys. Rev. Lett. 78, 3043 (1997)] have claimed to find evidence for a redshift-and direction-dependent rotation effect in existing data. We reexamine these data and argue that there is no statistically significant signal present. We are able to place stringent limits on hypothetical chiral interactions of photons propagating through spacetime.

引用

页码：2394 / 2397

页数：4

共 31 条

[1] Couplings and scales in strongly coupled heterotic string theory [J].