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arXiv 1901.03599astro-ph.IM
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低频射电天文中的偏振

Polarization in Low Frequency Radio Astronomy

Baptiste Cecconi

摘要:

本章介绍低频射电天文学中偏振测量的概念。在这种情况下,无线电波通常不是原子或分子跃迁谱线的特征,而是通过电磁辐射释放自由能的不稳定粒子分布函数的特征。由于射电源区通常是磁化的,传播介质(至少靠近源)是各向异性的,极化取决于局部磁场方向、传播模式和传播方向。

英文摘要:

This chapter introduces the concepts of polarimetry in the case of low frequency radio astronomy. In this regime radio waves are usually not the signature of atomic or molecular transitions lines, but rather that of unstable particle distribution functions releasing their free energy through electromagnetic radiation. As the radio source region is usually magnetized, the propagation medium (at least close to the source) is anisotropic, and the polarization depends on the local magnetic field direction, the propagation mode and the direction of propagation.

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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