论文标题
限制爱因斯坦的等价原理，并以极化大麻的多波长观测
Constraining Einstein's Equivalence Principle With Multi-Wavelength Observations of Polarized Blazars
论文作者
论文摘要
在本文中，我们提出了一种使用（同时）多波长无线电观测值来测试爱因斯坦等效原理（EEP）的新方法。我们分析了由韩国VLBI网络的两个天线获得的22、43和86 GHz时3C 279的多波长极化观测值。我们获得了15组极化数据，并在考虑EEP效应和最简单的Faraday旋转（单个外部Faraday屏幕）时应用了Metropolis-Hastings Markov链（MHMC）来模拟参数。最终结果显示了参数化后纽顿后（PPN）参数$γ$差异为$δγ_{p} =（1.91 \ pm0.34）\ times10^{ - 20} $。但是，单一的外部法拉第屏幕是对大麻的过度简化，因为许多观察结果表明，由于内部/外部法拉第分散剂，梁去极化等，大部分的法拉第旋转行为复杂。只有在揭示和考虑所有其他效果的情况下，如果结果被视为对EEP违规的直接测量。
In this paper, we present a novel method to test the Einstein's Equivalence Principle (EEP) using (simultaneous) multi-wavelength radio observations of polarized blazars. We analyze simultaneous multi-wavelength polarization observations of 3C 279 at 22, 43, and 86 GHz obtained by two antennas of the Korean VLBI Network. We obtained 15 groups of polarization data, and applied the Metropolis-Hastings Markov Chain (MHMC) to simulate the parameters when considering the EEP effect and the simplest form of Faraday rotation (single external Faraday screen). The final results show the constraint of the parameterized post-Newtonian (PPN) parameter $γ$ discrepancy as $Δγ_{p} = (1.91\pm0.34)\times10^{-20}$. However, the single external Faraday screen is an oversimplification for blazars because there are numerous observations show complex Faraday rotation behavior for blazars due to internal/external Faraday dispersion, beam depolarization, etc. The value $Δγ_{p}$ results of this paper can only be considered as upper limits. Only if all other effects are revealed and considered, should the result be taken as a direct measurement of the violation of the EEP.
