A Comparison between Faraday Tomography and Synchrotron Polarization Gradients

A Comparison between Faraday Tomography and Synchrotron Polarization Gradients
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DOI:
10.3847/1538-4357/ab578c
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发表时间:
2019-01
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
K. Ho;K. Yuen;P. Leung;A. Lazarian
K. Ho;K. Yuen;P. Leung;A. Lazarian
中科院分区:
其他
文献类型:
--
作者:
K. Ho;K. Yuen;P. Leung;A. Lazarian

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在存在法拉第旋转的情况下,在多个频率下的同步加速器偏振的观测可以提供一种重建3D磁场分布的方法。在本文中,我们比较了众所周知的法拉第层析成像(FT)技术的一种新的方法,同步辐射偏振相干(SPGs)。我们比较了这两种技术的优势和局限性,并描述了它们的协同作用。特别是,我们表明,在FT技术失败的情况下,例如,由于频率覆盖不足,SPG仍然可以跟踪磁场的3D结构。
Observations of synchrotron polarization at multiple frequencies in the presence of Faraday rotation can provide a way to reconstruct the 3D magnetic field distribution. In this paper we compare the well known Faraday Tomography (FT) technique to a new approach, Synchrotron Polarization Gradients (SPGs). We compare the strengths and limitations of the two techniques, and describe their synergy. In particular, we show that in situations when the FT technique fails, e.g., due to insufficient frequency coverage, the SPG can still trace the 3D structure of a magnetic field.