Studying the Local Magnetic Field and Anisotropy of Magnetic Turbulence by Synchrotron Polarization Derivative
Studying the Local Magnetic Field and Anisotropy of Magnetic Turbulence by Synchrotron Polarization Derivative
复制标题
用同步加速器偏振导数研究局部磁场和磁湍流的各向异性
DOI:
10.3847/1538-4357/ab88ac
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发表时间:
2020-04
期刊:
影响因子:
--
通讯作者:
Lazarian Alex
中科院分区:
文献类型:
--
作者:
Zhang Jian-Fu;Hu Ke;Cho Jungyeon;Lazarian Alex
Due to the inevitable accumulation of observational information in the direction of the line of sight, it is difficult to measure the local magnetic field of magnetohydrodynamic (MHD) turbulence. However, a correct understanding of the local magnetic field is a prerequisite for reconstructing the Galactic 3D magnetic field. We study how to reveal the local magnetic field direction and the eddy anisotropy on the basis of the statistics of synchrotron polarization derivative with respect to the squared wavelength dP/dλ2. In the low-frequency and strong Faraday rotation regime, we implement numerical simulations in the combination of multiple statistic techniques, such as structure function, quadrupole ratio modulus, spectral correlation function, correlation function anisotropy, and spatial gradient techniques. We find that (1) statistic analysis of dP/dλ2 indeed reveals the anisotropy of underlying MHD turbulence, the degree of which increases with the increase of the radiation frequency; and (2) the synergy of both correlation function anisotropy and gradient calculation of dP/dλ2 enables the measurement of the local magnetic field direction.
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DOI:
10.3847/1538-4357/aaae02
发表时间:
2017-01
期刊:
arXiv: Astrophysics of Galaxies
影响因子:
--
作者:
A. Lazarian;K. Yuen;Hyeseung Lee;Jungyeon Cho
通讯作者:
A. Lazarian;K. Yuen;Hyeseung Lee;Jungyeon Cho
DOI:
10.3847/1538-4357/ab4b4a
发表时间:
2019
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Zhang Jian-Fu;Liu Qian;Lazarian Alex
通讯作者:
Lazarian Alex
DOI:
10.3847/0004-637x/818/2/178
发表时间:
2015-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Lazarian;D. Pogosyan
通讯作者:
A. Lazarian;D. Pogosyan
DOI:
10.3847/2041-8213/aa6255
发表时间:
2017-01
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
K. Yuen;A. Lazarian
通讯作者:
K. Yuen;A. Lazarian
DOI:
10.1088/0004-637x/749/2/145
发表时间:
2011-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
B. Burkhart;A. Lazarian;B. Gaensler
通讯作者:
B. Burkhart;A. Lazarian;B. Gaensler