Testing the Millisecond Magnetar Model for Gamma-Ray Bursts and Superluminous Supernovae

测试伽马射线爆发和超光度超新星的毫秒磁星模型

• 批准号: 1410950
• 负责人: Brian Metzger
• 金额: $ 38.12万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-15 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1410950&HistoricalAwards=false
• 关键词: Testing; Millisecond; Magnetar; Model; Gamma

This award supports theoretical astrophysical studies of magnetars, which are a rarely observed type of neutron star. Neutron stars are city-sized objects that form out of the gravitational collapse of massive stars during a supernova explosion. Magnetars are fast-spinning and highly magnetic neutron stars that may have ultra-powerful eruptions in just a few hours. Their formation is still a mystery, but these short-lived outbursts are proposed to be the cause of many mysterious gamma-ray bursts and superluminous supernova explosions in the universe. The main focus of this work is to develop a prediction from the theoretical models that will be tested by observations. The PI will train and mentor undergraduate students in research and organize a two week long international summer school on ?theoretical modeling of astrophysical transients,? which will teach students how to analyze the physical properties of short-lived observed astronomical phenomena. The PI and his team will develop models of the neutrino-heated outflows from newly-formed protomagnetars. They will also solve the neutrino-heated magnetohydrodynamic wind equations along open field lines set by the force-free geometry of the magnetosphere. Finding new sites for the heavy r-process to operate is important for nucleosynthesis models, in general. The work will also study the observational signatures of the birth of millisecond magnetars by providing optical, X-ray and gamma-ray spectral predictions for comparison with observations. The work will also inform our understanding of the nuclear equation of state especially near the high-mass limit, which will probe the most extreme physical conditions in the universe.

该奖项支持磁星的理论天体物理学研究，磁星是一种很少观察到的中子星星。 中子星是城市大小的物体，是在超新星爆炸期间由大质量恒星的引力坍缩形成的。 磁星是快速旋转和高磁性的中子星，可能在短短几个小时内发生超强的爆发。它们的形成仍然是一个谜，但这些短暂的爆发被认为是宇宙中许多神秘的伽马射线爆发和超亮超新星爆炸的原因。这项工作的主要重点是从理论模型中得出一个预测，并通过观测进行检验。 PI将培训和指导本科生的研究，并组织为期两周的国际暑期学校？天体物理学瞬变的理论模型，？这将教学生如何分析观察到的短暂天文现象的物理特性。 PI和他的团队将开发新形成的原磁星的中微子加热流出模型。 他们还将解决中微子加热磁流体动力学风方程沿着开放的磁场线设置的磁层的无力几何。 一般来说，为重r过程寻找新的操作位点对核合成模型很重要。这项工作还将研究毫秒磁星诞生的观测特征，提供光学、X射线和伽马射线光谱预测，与观测结果进行比较。这项工作还将告知我们对核状态方程的理解，特别是在高质量极限附近，这将探测宇宙中最极端的物理条件。