Theory of Spectra of Supernovae in the Nebular Phase

星云相超新星光谱理论

• 批准号: 9528256
• 负责人: Richard McCray
• 金额: $ 24万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528256&HistoricalAwards=false
• 关键词: Theory; Spectra; Supernovae; Nebular; Phase

95-28256 McCray Dr. McCray will continue to develop theoretical tools for analyzing the spectra of supernovae. This analysis is particularly valuable during the nebular phase, a few months after the initial outburst, when the supernova debris has thinned enough to observe all the newly-synthesized elements created in the explosion. The spectrum is decoded using a theoretical model of spectrum formation. This project will concentrate on two specific projects. The first is to complete the development of comprehensive models to describe the evolution of the spectrum of SN1987A, especially the transfer and fluorescence of the ultraviolet radiation. The second is to develop theoretical models for the nebular spectra of Type Ia supernovae. There are indications that this might be a reliable method for calibrating the true luminosity of such sources, thus providing standard candles with which distances to galaxies can be determined. ***

95-28256麦克雷博士将继续开发分析超新星光谱的理论工具。在最初爆发几个月后的星云阶段，这种分析特别有价值，当时超新星碎片已经变薄到足以观察到爆炸中产生的所有新合成的元素。利用频谱形成的理论模型对频谱进行解码。这个项目将集中在两个具体项目上。首先是完成描述SN1987A光谱演化的综合模型的开发，特别是紫外线辐射的传输和荧光。二是建立Ia型超新星星云光谱的理论模型。有迹象表明，这可能是校准这些源的真实光度的可靠方法，从而提供标准蜡烛，可以用来确定到星系的距离。***