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arXiv 2106.03573astro-ph.HEastro-ph.GA
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同步加速器偏振诊断的梯度测量:应用于空间分离的发射区和法拉第旋转区

Gradient measurement of synchrotron polarization diagnostic: Application to spatially separated emission and Faraday rotation regions

Ru-Yue Wang, Jian-Fu Zhang, Alex Lazarian, Hua-Ping Xiao, Fu-Yuan Xiang

摘要:

考虑空间分离的偏振辐射和法拉第旋转区域来模拟复杂的星际介质,研究了同步辐射偏振梯度技术的测量能力。通过与传统的极化矢量法的比较,探讨了如何利用梯度法在多频段上跟踪发射源区投影磁场的方向。此外,我们研究了法拉第旋转密度在前景区域,即,电子数密度与沿视线的磁场的平行分量的乘积影响投影磁场的测量。数值结果表明,同步辐射偏振梯度技术可以成功地跟踪发射源区域内的投影磁场,与射频无关。因此,梯度技术可以测量复杂天体物理环境的磁场特性。

英文摘要:

Considering the spatially separated polarization radiation and Faraday rotation regions to simulate complex interstellar media, we study synchrotron polarization gradient techniques' measurement capabilities. We explore how to trace the direction of projected magnetic field of emitting-source region at the multi-frequency bands, using the gradient technique compared with the traditional polarization vector method. Furthermore, we study how Faraday rotation density in the foreground region, i.e., a product of electron number density and parallel component of magnetic fields along the line of sight, affects the measurement of projected magnetic field. Numerical results show that synchrotron polarization gradient technique could successfully trace projected magnetic field within emitting-source region independent of radio frequency. Accordingly, the gradient technique can measure the magnetic field properties for a complex astrophysical environment.

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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