活动星系核光学偏振测量中洛伦兹和CPT破坏的标准模型扩展约束

A. Friedman, D. Leon, R. Gerasimov, K. Crowley, Isaac A. Broudy, Yash Melkani, Walker Stevens, Delwin Johnson, G. Teply, D. Tytler, B. Keating, G. M. Cole
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引用次数: 1

摘要

在标准模型扩展中,洛伦兹真空双折射和CPT违反可以用河外源的地基光学偏振测量来约束。我们描述了一个试点项目的结果,该系统可以在不同的望远镜上同时进行多个波段的光学偏振测量,有效孔径为0.45 m。尽管收集区域有限,我们使用比以前研究更宽的有效光通带对AGN进行偏振测量,为标准模型扩展质量维度$d = 5$算子提供了单独的视线约束,其约束系数约为使用3.6米望远镜获得的数据获得的可比宽带极化边界的1到10倍,大约是收集区域的64倍。在更高的$d$下约束更一般的各向异性标准模型扩展系数将需要沿不同视距的更多AGN。这激发了未来专门的地基、多波段、光学偏振AGN调查,使用$\gtrsim $ 1$ m级望远镜,以获得最先进的各向异性标准模型扩展$d = 4,5,6 $约束,同时还使用互补档案偏振测量。与光谱偏振法相比,这种方法可以更快、更经济地实现,而且在太空或气球x射线/伽马射线偏振测量更具竞争性的限制之前就可以实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Standard-Model Extension Constraints on Lorentz and CPT Violation from Optical Polarimetry of Active Galactic Nuclei
Vacuum birefringence from Lorentz and CPT violation in the Standard-Model Extension can be constrained using ground-based optical polarimetry of extragalactic sources. We describe results from a pilot program with an automated system that can perform simultaneous optical polarimetry in multiple passbands on different telescopes with an effective 0.45 m aperture. Despite the limited collecting area, our polarization measurements of AGN using a wider effective optical passband than previous studies yielded individual line-of-sight constraints for Standard-Model Extension mass dimension $d = 5$ operators within a factor of about one to ten of comparable broadband polarimetric bounds obtained using data from a 3.6 m telescope with roughly 64 times the collecting area. Constraining more general anisotropic Standard-Model Extension coefficients at higher $d$ would require more AGN along different lines of sight. This motivates a future dedicated ground-based, multi-band, optical polarimetry AGN survey with $\gtrsim 1$ m-class telescopes, to obtain state-of-the-art anisotropic Standard-Model Extension $d = 4, 5, 6$ constraints, while also using complementary archival polarimetry. This could happen more quickly and cost-effectively than via spectropolarimetry and long before more competitive constraints from space- or balloon-based x-ray/$\gamma$-ray polarization measurements.
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