Gamma-Ray Bursts: Unique Tools for High Red-shift Cosmology

伽马射线爆发：高红移宇宙学的独特工具

• 批准号: 0507571
• 负责人: Rosalba Perna
• 金额: $ 27.77万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507571&HistoricalAwards=false
• 关键词: Gamma; Ray; Bursts; Unique; Tools

AST-0507571PernaThe association of long Gamma Ray Bursts (GRBs) with the death of massive stars makes them a goldmine for cosmology, since they can be expected to redshifts of 20 or even higher, when the first stars are believed to have formed. This project will exploit GRBs, by measuring the density, composition and mass of star-forming molecular clouds surrounding GRBs, by measuring dust extinction curves in GRB environments to study dust grain composition and physics, by comparing GRB environments to those of active galactic nuclei, and by further pursuing the tentative promise of GRBs as distance indicators. Much of this work depends on using and enhancing the unique time-dependent photo-ionization and dust-destruction code recently developed by the investigators.Part of this project is to make this improved code user friendly and publicly available, as it will be broadly useful in other areas of astronomy. In addition, the principal researcher is a woman, and by incorporating material from her own research in undergraduate science courses for non science majors, and by giving high school talks, she will be encouraging more women to get interested in science.

AST-0507571 Perna长伽玛射线暴（GRB）与大质量恒星死亡的联系使它们成为宇宙学的金矿，因为当第一颗恒星被认为已经形成时，它们的红移可以达到20甚至更高。 该项目将利用伽马射线暴，测量伽马射线暴周围形成恒星的分子云的密度、组成和质量，测量伽马射线暴环境中的尘埃消光曲线以研究尘埃颗粒的组成和物理学，将伽马射线暴环境与活动星系核的环境进行比较，并进一步探索伽马射线暴作为距离指示器的初步前景。 这项工作的很大一部分取决于使用和增强研究人员最近开发的独特的随时间变化的光电离和尘埃破坏代码，该项目的一部分是使这一改进的代码用户友好和公开，因为它将在天文学的其他领域广泛使用。 此外，首席研究员是一名妇女，通过将她自己的研究材料纳入非理科专业的本科理科课程，并通过在高中进行演讲，她将鼓励更多的妇女对科学感兴趣。