Observations of the Physical Structures in Supernova Remnants

超新星遗迹物理结构的观测

• 批准号: 9015786
• 负责人: John Dickel
• 金额: $ 2万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9015786&HistoricalAwards=false
• 关键词: Observations; Physical; Structures; Supernova; Remnants

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.

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以及观测到的排放的产生的问题。这些项目包括搜索M31星系SN1885残骸的射电波长发射，从不同年龄的残骸在一个以上波长进行连续射电观测，以评估它们的频谱及其粒子加速机制，研究场强和场结构与发射区形态的关系的无线电波长偏振测量，以及一些发射措施的研究，以调查视线上的深度，并将发射与不同形状的发射特征的模型相关联。超新星遗迹有各种各样的结构，从射电到X射线，在所有波长范围内都可以观察到。年轻的残骸在射电和X射线波长下，在外壳的外周显示了几个非常细的光学细丝，然后是一个更厚的不规则外壳。较老的残骸具有相同的放射和光学形态，由更分散的X射线和射电发射的壳层中的一组曲折的细丝组成。现代口径合成射电望远镜和光学探测器的分辨率、灵敏度和精确度现在给我们提供了回答一些与超新星残骸结构有关的重要问题的机会。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结构。