Magnetic field analysis of the bow and terminal shock of the SS 433 jet
Magnetic field analysis of the bow and terminal shock of the SS 433 jet
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SS 433 喷气机的弓和末端激波的磁场分析
DOI：
10.1093/pasj/psy003
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发表时间：
2018
影响因子：
2.3
通讯作者：
Farnes J.
中科院分区：
文献类型：
--
作者：
Sakemi H.;Machida M.;Akahori T.;Nakanishi H.;Akamatsu H.;Kurahara K.;Farnes J.
本文报道了澳大利亚望远镜紧凑型阵列（ATCA）在1.4-3.0 GHz波段观测到的w50东部区域的偏振分析。为了研究SS 433射流与w50相互作用区域的物理结构，我们获得了该区域的本征磁场矢量图。我们发现，本征磁场矢量的方向沿总强度结构排列，并且存在与射流、弓形激波和末端激波相关的特征的、独立的结构。法拉第旋转测量（RMs）和法拉第层析成像结果表明，东部边缘地区南北方向的高强度丝状结构可以至少分为南北两个部分。法拉第层析成像的结果也表明，沿着视线和/或在光束区域内存在多个分量。此外，我们还对XMM-Newton观测到的x射线环状结构进行了分析。虽然这个x射线环是“真实的”的可能性仍然存在，但在无线电波长下，这个结构似乎不是环状的。最后，我们认为该结构是缠绕在w50东侧的螺旋结构的一部分。
We report a polarization analysis of the eastern region of W 50, observed with the Australia Telescope Compact Array (ATCA) at 1.4–3.0 GHz. In order to study the physical structures in the region where the SS 433 jet and W 50 interact, we obtain an intrinsic magnetic field vector map of that region. We find that the orientation of the intrinsic magnetic field vectors are aligned along the total intensity structures, and that there are characteristic, separate structures related to the jet, the bow shock, and the terminal shock. The Faraday rotation measures (RMs), and the results of Faraday tomography suggest that a high-intensity, filamentary structure in the north–south direction of the eastern-edge region can be separated into at least two parts to the north and south. The results of Faraday tomography also show that there are multiple components along the line of sight and/or within the beam area. In addition, we analyze the X-ray ring-like structure observed with XMM-Newton. While the possibility still remains that this X-ray ring is “real”, it seems that the structure is not ring-like at radio wavelengths. Finally, we suggest that the structure is a part of the helical structure that coils the eastern ear of W 50.