LIMITS ON COSMOLOGICAL BIREFRINGENCE FROM THE ULTRAVIOLET POLARIZATION OF DISTANT RADIO GALAXIES

被引：34

作者：

Alighieri, Sperello di Serego ^{[1
]}

Finelli, Fabio ^{[2
,3
]}

Galaverni, Matteo ^{[2
]}

机构：

[1] INAF Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[2] INAF IASF Bologna, I-40129 Bologna, Italy

[3] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 715卷 / 01期

关键词：

cosmology: miscellaneous; polarization; radio continuum: galaxies; ANISOTROPY; QUASARS; LIGHT; FIELD; DUST;

D O I：

10.1088/0004-637X/715/1/33

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on an update of the test on the rotation of the plane of linear polarization for light traveling over cosmological distances, using a comparison between the measured direction of the UV polarization in eight radio galaxies at z > 2 and the direction predicted by the model of scattering of anisotropic nuclear radiation, which explains the polarization. No rotation is detected within a few degrees for each galaxy and, if the rotation does not depend on direction, then the all-sky-average rotation is constrained to be theta = -0 degrees.8 +/- 2 degrees.2. We discuss the relevance of this result for constraining cosmological birefringence when this is caused by the interaction with a cosmological pseudo-scalar field or by the presence of a Cherns-Simons term.

引用

页码：33 / 38

页数：6

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