Optical and Near - Infrared Studies of Bok Globules: Cloud Distances, Structures, and Magnetic Field Configurations

Bok 球体的光学和近红外研究：云距离、结构和磁场配置

• 批准号: 8915606
• 负责人: Dan Clemens
• 金额: $ 6.5万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8915606&HistoricalAwards=false
• 关键词: Optical; Near; Infrared; Studies; Bok

Dr. Clemens will study the radial dust distributions and magnetic field configurations of small Bok globules using a combination of photometric and polarimetric observations at optical and near- infrared wavelengths. Information will be deduced about the distribution of mass within these small interstellar clouds, how magnetic fields either help or hinder the formation of new stars, and how the magnetic fields reveal the interaction of the Bok globules with their surroundings. A serious gap in our understanding of the details of the star formation process involves our knowledge of the physical conditions existing in molecular clouds just prior to the onset of star formation. We know neither the basic physical structures of the cores of these molecular clouds before stars form, nor which physical variables have ordered the cores and will control their evolution. Dr. Clemens has chosen a sample of small clouds which are relatively simple structures, uncomplicated by active, multiple, or massive star formation. He is interested in understanding how these Bok globules and star formation within them is affected by embedded magnetic fields and large scale gas motions, such as turbulence and rotation.

克莱门斯博士将研究尘埃的径向分布和磁场 场配置的小博克球使用的组合 光学和近红外波段的光度和偏振观测 红外波长 信息将被推断出关于 在这些小的星际云中的质量分布， 磁场会帮助或阻碍新恒星的形成， 以及磁场是如何揭示博克星系 与周围环境的关系。 我们对星星细节的理解存在严重的差距 形成过程涉及到我们对物理条件的了解 在星星形成之前存在于分子云中 阵 我们既不知道地球的基本物理结构， 在恒星形成之前，这些分子云的核心， 物理变量已经命令核心，并将控制它们的 进化 克莱门斯博士选择了一个小云团的样本， 是相对简单的结构，不复杂的活性， 多个或大质量星星的形成。 他感兴趣于 了解这些博克球状体和其中的星星是如何形成的 受到嵌入磁场和大规模气体的影响 运动，如湍流和旋转。