Supernova 1987A: Versatile Astrophysical Tool & Unique Opportunity to Study SNR Formation

Supernova 1987A：多功能天体物理工具

• 批准号: 0807638
• 负责人: Arlin P. Crotts
• 金额: $ 17.86万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807638&HistoricalAwards=false
• 关键词: Supernova; 1987A; Versatile; Astrophysical; Tool

Supernova 1987A, the closest supernova seen in nearly four centuries, and the most intensely studied, is rapidly turning into a supernova remnant as the ejecta from the explosion now strikes the circumstellar envelope shed by the star over the last million years. In this project, this process will be followed using a combination of archival, optical, infra-red and ultra-violet programs, plus space-based studies. Previous observations taken by Dr. Crotts of the three dimensional structure, velocities, density and composition will establish the nature of the pre-explosion nebula and the mass loss processes that created it, while new observations of the excitation of this nebula by the X-ray and extreme ultra-violet flux created in the collision will enable Dr. Crotts to re-analyze it once more. In addition to this study of a supernova remnant, Dr. Crotts will continue to use light echoes from the supernova explosion to explore the interstellar medium in the 30 Doradus star-formation region, to study the echo of the ultra-violet pulse from supernova shock breakout through the progenitor star's surface, and accurately to determine the distance to the Large Magellanic Cloud - a fundamental rung on the extragalactic distance ladder. Dr. Crotts will also explore the application of his image differencing software to biomedical imaging - specifically how the image processing algorithms used to trace changes in the appearance of supernova echoes can track changes in other data sets, prominently CT-scan dye tests used for early detection of cancerous growths. The light echo data will also be used in renderings and animations as part of several public-access demonstrations of the fascinating structures revealed by light echoes.

Supernova 1987a是近四个世纪以来最接近的超新星，并且研究最深思，它正迅速变成超新星残留物，因为爆炸的弹射弹出现在击中了过去一百万年内，这只星星被恒星散发而成。在此项目中，将使用档案，光学，红外和超紫罗兰色计划以及基于空间的研究的结合进行此过程。 Crotts博士对三维结构，速度，密度和组成的先前观察将确定探索前星云的性质以及创造它的质量损失过程，而X射线和极端超级伏的浓度的新观察结果将在碰撞中创造出来的Crotts Dr. Crotts Dr. Re-re-andanyalle re re-anyaly。除这项对超新星残留物的研究外，克罗茨博士还将继续使用超新星爆炸的光回声探索30个多拉多斯星星拟人型区域中的星际介质，研究超新星脉搏的超级抗衡脉冲的回声，从超级Nova的脉冲中，通过远距离的范围，并确定远距离的范围 - 外层次距离梯子。 Crotts博士还将探索其图像差异软件在生物医学成像中的应用 - 特别是用于跟踪超新星回波外观变化的图像处理算法如何跟踪其他数据集中的变化，显着的CT -Scan can染料测试，用于早期检测果胶的早期检测。光回声数据也将用于渲染和动画中，这是光回声揭示的几个公开访问演示的一部分。