Solving the Type Ia Supernova Progenitor Puzzle

解决 Ia 型超新星祖细胞之谜

• 批准号: 1211843
• 负责人: Rosanne Di Stefano
• 金额: $ 28.62万
• 依托单位: Smithsonian Institution Astrophysical Observatory
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1211843&HistoricalAwards=false
• 关键词: Solving; Type; Ia; Supernova; Progenitor

This award will fund a combined theoretical and observational study to address the origins of Type Ia supernovae. Dr. Di Stefano and her collaborators will create extensive population synthesis simulations that employ observations to compute the appearance of supernovae at two stages of evolution: during an epoch when a white dwarf gains mass and during a possible second epoch, when the white dwarf may need to spin down before it can explode. This group will compute the expected signatures in, and mine existing large data sets for, supernova progenitors in recent large surveys to identify the locations some of the thousands of progenitors that inhabit the Milky Way and Magellanic Clouds. In recent years, astronomers have proposed that these stellar explosions may have come from a variety of situations involving compact stellar remnants such as white dwarfs. Understanding the origins of supernovae is viewed as a key issue in improving studies of the history of the expansion of the universe. Dr. Di Stefano will also continue her efforts in public education and outreach, and will include students at many different levels (high school through graduate school) in this project.

该奖项将资助一项综合理论和观测研究，以解决Ia型超新星的起源。 Di Stefano博士和她的合作者将创建广泛的人口合成模拟，利用观测来计算超新星在两个演化阶段的外观：在白色矮星获得质量的时期，以及在可能的第二个时期，当白色矮星可能需要在爆炸之前旋转时。 该小组将在最近的大型调查中计算超新星祖先的预期签名，并挖掘现有的大型数据集，以确定居住在银河系和麦哲伦云的数千个祖先中的一些位置。近年来，天文学家提出，这些恒星爆炸可能来自各种情况，涉及紧凑的恒星残余物，如白色矮星。 了解超新星的起源被认为是改善宇宙膨胀历史研究的关键问题。 迪斯特凡诺博士还将继续她在公共教育和推广方面的努力，并将包括许多不同层次的学生（高中到研究生院）在这个项目。