Numerical Simulations of Plasmas and Their Spectra - Applications to Emission Line Regions of Quasars

等离子体及其光谱的数值模拟 - 在类星体发射线区域的应用

• 批准号: 9617083
• 负责人: Gary Ferland
• 金额: $ 32万
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617083&HistoricalAwards=false
• 关键词: Numerical; Simulations; Plasmas; Their; Spectra

Ferland, Gary 96-17083 Dr. Ferland will continue to improve the large- scale code called Cloudy, which computes the spectrum of gas in photoionization or collisional balance, and will apply it to a number of problems in nebular astrophysics. Cloudy requires updates which reflect advances in the atomic data base which it uses and improvements in the numerical and computational methods used in the simulation. The code will be tested on ablating molecular clouds, the likely origin of some gas in quasars. For quasar studies the first step is to deduce the composition of their emitting gas from the spectrum, then to determine the dependencies of this spectrum on the shape of the ionizing continuum and to correlate this with observed changes in the spectral energy distribution.

Ferland，加里96-17083 费兰博士将继续改进名为“云”的大规模代码，该代码计算光电离或碰撞平衡中气体的光谱，并将其应用于星云天体物理学中的许多问题。 多云需要更新，以反映其使用的原子数据库的进展以及模拟中使用的数值和计算方法的改进。 该代码将在烧蚀分子云上进行测试，这可能是类星体中某些气体的来源。 对于类星体研究，第一步是从光谱中推断出它们发射气体的成分，然后确定这个光谱对电离连续谱形状的依赖性，并将其与光谱能量分布中观察到的变化相关联。