The Tempurature and Ionization Structure of Non-Spherical Circumstellar Envelopes

非球形星周包层的温度和电离结构

• 批准号: 9819928
• 负责人: Jon Bjorkman
• 金额: $ 27.59万
• 依托单位: University of Toledo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819928&HistoricalAwards=false
• 关键词: Tempurature; Ionization; Structure; Non; Spherical

ABSTRACTBjorkman, JonAST-9819928This project focuses on the development of modeling techniques for the determination of radiation fields, temperatures and ionization properties for non-spherical stellar atmospheres and circumstellar envelopes. Such models are critically needed to interpret a wide variety of new high spatial and spectral resolution observations that are now available for such objects as Wolf-Rayet stars, Herbig-Haro Ae/Be stars, O- and B-type stars, and evolving asymptotic giant branch stars. In addition, the product of this research is likely to be useful in interpreting the observational properties of objects that have experienced explosive eruptions, like supernovae. The initial effort will employ a Monte Carlo (statistical) approach to approximating the radiative transfer calculations of non-equilibrium axisymmetric and 'clumpy' atmospheres. The new work builds upon a previously developed two-dimensional axisymmetric model of winds from rapidly rotating hot stars, the so-called "wind-compressed disk model."

AbstractBjorkman，Jonast-9819928此项目着重于确定辐射场，温度和电离特性的建模技术的开发，用于非球形恒星气氛和偶发性信封。 需要至关重要的模型来解释各种新的高空间和光谱分辨率观测值，这些观测值现在可用于诸如狼射线恒星，Herbig-Haro Ae/Be恒星，O-和B型恒星，以及不断发展的渐近巨型分支星星等物体。 此外，这项研究的产物可能对解释经历过爆炸性爆发的物体的观察性质有用，例如超新星。 最初的努力将采用蒙特卡洛（统计）方法来近似非平衡轴对称和“块状”气氛的辐射转移计算。 这项新作品建立在先前开发的二维轴对称模型上，从快速旋转的热星，即所谓的“风盘模型”。