论文标题
无线电观测的太阳冠磁场的诊断功能
Diagnostic functions of solar coronal magnetic fields from radio observations
论文作者
论文摘要
在太阳能物理学中，直接从太阳大气中的观测值（包括色球和电晕）中直接测量磁场是一个巨大的挑战。无线电观察被认为是诊断太阳能球和电晕中磁场的最可行的方法。但是，由于发射机制的复杂性和多样性，先前的研究仅介绍了磁场的隐式诊断功能，用于来自太阳能无线电观察的特定机制。这项工作收集并整理了从太阳能无线电观测值诊断冠状磁场的所有方法，这些方法表示为一组显式诊断功能。特别是，这项工作补充了其他评论中错过的一些重要诊断方法。这组诊断功能可以完全覆盖太阳能球和电晕的所有区域，包括安静区域，活动区域和燃烧源区域。 At the same time, it also includes incoherent radiation such as bremsstrahlung emission of thermal plasma above the quiet region, cyclotron and gyro-synchrotron emissions of magnetized hot plasma and mildly relativistic nonthermal electrons above the active regions, as well as coherently plasma emission around flaring source regions. Using this set of diagnostic functions and the related broadband spectral solar radio imaging observations, we can derive the magnetic fields of almost all regions in the solar atmosphere,which may help us to make full use of the spectral imaging observations of the new generation solar radio telescopes (such as MUSER, EVOSA and the future FASR, etc.) to study the solar activities, and provide a reliable basis for the prediction of disastrous space weather events.
In solar physics, it is a big challenge to measure the magnetic fields directly from observations in the upper solar atmosphere, including the chromosphere and corona. Radio observations are regarded as the most feasible approach to diagnose the magnetic field in solar chromosphere and corona. However, because of the complexity and diversity of the emission mechanisms, the previous studies have only presented the implicit diagnostic functions of the magnetic field for specific mechanism from solar radio observations. This work collected and sorted out all methods for diagnosing coronal magnetic field from solar radio observations, which are expressed as a set of explicit diagnostic functions. In particular, this work supplemented some important diagnostic methods missed in other reviews. This set of diagnostic functions can completely cover all regions of the solar chromosphere and corona, including the quiet region, active region and flaring source regions. At the same time, it also includes incoherent radiation such as bremsstrahlung emission of thermal plasma above the quiet region, cyclotron and gyro-synchrotron emissions of magnetized hot plasma and mildly relativistic nonthermal electrons above the active regions, as well as coherently plasma emission around flaring source regions. Using this set of diagnostic functions and the related broadband spectral solar radio imaging observations, we can derive the magnetic fields of almost all regions in the solar atmosphere,which may help us to make full use of the spectral imaging observations of the new generation solar radio telescopes (such as MUSER, EVOSA and the future FASR, etc.) to study the solar activities, and provide a reliable basis for the prediction of disastrous space weather events.
