Observations of the Physical Structures in Supernova Remnants

迪克尔博士计划了几个具体的项目，以回答有关超新星遗迹中细丝的结构特性和观测到的辐射产生的问题。这些项目包括寻找M31星系中SN1885残余物的射电波长发射，在不同年龄的残余物中进行多个波长的连续射电观测，以评估它们的光谱和粒子加速机制；无线电波长偏振法研究场强和场结构与发射区域形态的关系，以及一些发射措施的研究，研究沿视线的深度，并将发射与各种形状的发射特征模型联系起来。超新星残骸有各种各样的结构，可以在从射电到x射线的所有波长范围内观察到。在射电和x射线波段，年轻的残余物在外壳的外缘显示出一些非常薄的光学细丝，然后是一个更厚的不规则外壳。较老的残余物具有相同的射电和光学形态，包括在更漫射的x射线和射电发射的外壳中收集弯曲的细丝。现代孔径合成射电望远镜和光学探测器的分辨率、灵敏度和精度现在使我们有机会回答一些与超新星残骸结构有关的重要问题。迪克尔博士的研究计划旨在利用最近可用的最先进的仪器来详细检查超新星遗迹的结构。

Dr. Dickel has planned several specific projects to answer questions about the structural properties of filaments in supernova remnants and the generation of their observed emission. The projects include searching for radio wavelength emission from the remnant SN1885 in the galaxy M31, continuum radio observations at more than one wavelength from remnants with different ages to evaluate their spectra and their particle acceleration mechanisms, radio wavelength polarimetry to study both the field strength and the relation of the field structure to the morphology of the emitting regions, and some studies of emission measures to investigate the depth along the line of sight and relate the emission to models of variously shaped emitting features. Supernova remnants have a variety of structures which can be observed in all wavelength regimes from the radio through the x- ray. Young remnants show a few very thin optical filaments on the outer periphery of the shell and then a thicker irregular shell at radio and x-ray wavelengths. The older remnants have identical radio and optical morphology consisting of a collection of sinuous filaments in a shell of more diffuse x-ray and radio emission. The resolution, sensitivity, and accuracy of modern aperture synthesis radio telescopes and optical detectors are now giving us the opportunity to answer some important questions relating to the structures of the remnants of supernovae. Dr. Dickel's research program is designed to take advantage of recently available state of the art instrumentation to examine supernova remnant structures in detail.