类星体偏振矢量的大尺度排列：极轻赝标量粒子与光子混合的宇宙学尺度证据？
Large-Scale Alignments of Quasar Polarization Vectors: Evidence at Cosmological Scales for Very Light Pseudoscalar Particles Mixing with Photons?
摘要：
基于355个具有显著光学偏振的类星体的样本，我们发现类星体的偏振矢量并不像自然预期的那样在天空中随机取向。观察到的偏振角分布是偶然的概率低于0.1%。类星体发出的光的偏振矢量是对齐的，尽管这些光源跨越了天空的巨大区域（~ 1 Gpc）。沿着相似的视线但红移不同（通常为z ~ 0.5和z ~ 1.5）的类星体群具有不同的偏振优先方向。这些特征使得观测到的排列效应很难用我们银河系中星际极化的局部污染来解释。解释的宇宙尺寸效应，我们表明，二向色性和双折射预测的光子和非常轻的赝标量粒子之间的混合在磁场可以定性再现的意见。我们发现，圆偏振测量可以帮助限制这种机制。
英文摘要：
Based on a sample of 355 quasars with significant optical polarization, we found that quasar polarization vectors are not randomly oriented over the sky as naturally expected. The probability that the observed distribution of polarization angles is due to chance is lower than 0.1%. The polarization vectors of the light from quasars are aligned although the sources span huge regions of the sky (~ 1 Gpc). Groups of quasars located along similar lines of sight but at different redshifts (typically z ~ 0.5 and z ~ 1.5) are characterized by different preferred directions of polarization. These characteristics make the observed alignment effect difficult to explain in terms of a local contamination by interstellar polarization in our Galaxy. Interpreted in terms of a cosmological-size effect, we show that the dichroism and birefringence predicted by a mixing between photons and very light pseudoscalar particles within a magnetic field can qualitatively reproduce the observations. We find that circular polarization measurements could help constrain this mechanism.
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。
