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arXiv 1003.4823astro-ph.COgr-qc
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远距离射电星系紫外偏振对宇宙学双折射的限制

Limits on Cosmological Birefringence from the Ultraviolet Polarization of Distant Radio Galaxies

Sperello di Serego Alighieri, Fabio Finelli, Matteo Galaverni

摘要:

我们报告更新的测试上的旋转的线偏振平面的光在宇宙学的距离,使用的比较在8个射电星系在z>2和预测的方向的各向异性核辐射的散射模型,这解释了偏振的UV偏振的测量方向。每个星系在几度内都没有检测到旋转,如果旋转不依赖于方向,那么全天空平均旋转被限制为θ= -0.8 +/- 2.2。我们讨论的相关性约束宇宙学双折射的结果,当这是由一个宇宙学伪标量场的相互作用或存在的Cherns-Simons项。

英文摘要:

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 8 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 θ= -0.8 +/- 2.2. 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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