Collaborative Research:The Supernova Rate and Delay Time Distribution in the Local Group

合作研究：本星系群中的超新星发生率和延迟时间分布

• 批准号: 1412980
• 负责人: Laura Chomiuk
• 金额: $ 26.86万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-15 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1412980&HistoricalAwards=false
• 关键词: Collaborative; Research; Supernova; Rate; Delay

Supernovae are violent stellar explosions that can briefly outshine the cumulative light from all the stars in a galaxy. Supernovae are important because they return heavy elements to the empty space in the galaxy, thus seeding the next generation of stars and planets. The rate at which supernovae occur is crucial to our understanding of the evolution of galaxies and the Universe as a whole. This proposal will investigate two important quantities related to supernovae by observing the objects that are left behind after a supernova explosions and modeling the brightness of these supernova remnants.The goal of this proposal is to investigate the supernova (SN) rate and the delay time distribution (DTD) of supernovae (SNe). The DTD is a quantity that describes how the SN rate varies with the age of a stellar population. The project will impact our understanding of two key questions regarding SNe, namely: What are the progenitors of Type Ia SNe?, and What is the range of masses for progenitors of core collapse SNe? The PIs propose an innovative approach to determining the SN rate and DTD that involves: (1) compiling a deep sample of SN remnants from four galaxies in the Local Group, (2) measuring the density and distribution of the interstellar medium in these galaxies, and (3) using calibrated models for the luminosity of the SN remnants to determine the SN rate and DTD. The study of the properties (i.e. size and luminosity) of supernova remnant populations will be broadly relevant to questions of galaxy evolution and cosmic ray origins.The project will communicate its results to the general public through lectures and hands-on astronomy activities for audiences of all ages. Both PI's are heavily involved in the education and training of graduate and undergraduate students, and the proposed work will further strengthen the students' exposure to astronomical research into supernovae.

超新星是剧烈的恒星爆炸，可以短暂地超过银河系中所有星星的累积光。 超新星很重要，因为它们将沉重的元素返回到银河系中的空白空间，从而播种了下一代的恒星和行星。 超新星发生的速度对于我们对星系和整个宇宙的演变的理解至关重要。 该提案将通过观察超新星爆炸后留下的物体并对这些超新星残留物的亮度进行建模，研究与超新星有关的两个重要数量。该提案的目的是研究超新星（SN）速率（SN）速率（SN）速率（SN）速率（SN）延迟时间分布（DTD）。 DTD是描述SN速率如何随恒星种群的年龄变化的数量。 该项目将影响我们对有关SNE的两个关键问题的理解，即：IA型SNE型的祖细胞是什么？核心倒塌SNE的祖细胞的群体范围是多少？ PI提出了一种创新的方法来确定涉及的SN速率和DTD：（1）在本地组中四个星系中的SN残留物进行了深度样本，（2）（2）测量这些星系中星际介质的密度和分布，（3）使用校准模型来确定SN Remnants sn remnants sn速率和sn速率和DDD的光度。 对超新星残留人群的性质（即规模和发光度）的研究将与星系进化和宇宙射线起源的问题广泛相关。该项目将通过所有年龄段的受众的讲座和动手的天文学活动将其结果传达给公众。 PI都大量参与了研究生和本科生的教育和培训，拟议的工作将进一步加强学生对超新星天文学研究的接触。