CAREER: Massive Stellar Explosions and their Host Galaxy Environments

职业：大规模恒星爆炸及其宿主星系环境

• 批准号: 1352405
• 负责人: Maryam Modjaz
• 金额: $ 50万
• 依托单位: New York 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: 2014-04-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1352405&HistoricalAwards=false
• 关键词: CAREER; Massive; Stellar; Explosions; their

This award will enable Professor Maryam Modjaz of New York University to infer the properties of stripped supernovae (SNe) progenitors by measuring the properties of the local environment within their host galaxies. She will use the sample of 89 stripped supernovae from the Palomar Transient Factory survey, in order to reduce the known biases in previous samples toward high-metallicity galaxies. She will obtain spectra of the host galaxies and the portion of the host containing the supernovae. The mean metallicity in the host galaxy and in the SNe environments will be inferred from the Oxygen abundances measured from these spectra. The PI and her collaborators will also obtain high-resolution images of the more distant galaxies in order to map the blue-light distribution in the host galaxies. These will be used to characterize regions of active star formation and to determine the overall galaxy mass. The color and metallicity of the spatially-resolved region around the SNe will also be used to draw conclusions about the mass and metallicity of the progenitors. Long-duration gamma-ray bursts and stripped supernovae are among the most powerful explosions in the universe. Both are signals of the cataclysmic death of massive stars, but they contribute differently to the creation of heavy elements. The research funded with this award will lead to a better understanding of the chemical evolution of the universe by providing tools to determine which properties of stars determine their ultimate fate. This research will be integrated with the PI's education plans through two projects in cooperation with the American Museum of Natural History. Professor Modjaz will teach an after-school course entitled "Explosions in the Universe". The curriculum will be structured around teaching pedagogy that is likely to change student perceptions of the scientific process, using strategies and mentoring that enhance the learning of young women and underrepresented groups. In addition, the PI will coordinate astronomers at New York City area astronomy departments to participate in the Science Research Mentoring Program through AMNH. Through this program, high school students will participate in cutting-edge research and present their results at a workshop.

该奖项将使纽约大学的 Maryam Modjaz 教授能够通过测量其宿主星系内的局部环境特性来推断剥离超新星 (SNe) 前身的特性。 她将使用帕洛玛瞬变工厂调查中的 89 颗剥离超新星样本，以减少先前样本中对高金属丰度星系的已知偏差。 她将获得宿主星系和包含超新星的宿主部分的光谱。 宿主星系和超新星环境中的平均金属丰度将根据这些光谱测量的氧丰度来推断。 PI 和她的合作者还将获得更遥远星系的高分辨率图像，以便绘制宿主星系中的蓝光分布图。 这些将用于表征活跃恒星形成的区域并确定整个星系的质量。 超新星周围空间分辨区域的颜色和金属丰度也将用于得出有关前身的质量和金属丰度的结论。 长时间伽马射线爆发和剥离超新星是宇宙中最强大的爆炸之一。 两者都是大质量恒星灾难性死亡的信号，但它们对重元素产生的贡献不同。 该奖项资助的研究将通过提供工具来确定恒星的哪些特性决定其最终命运，从而更好地了解宇宙的化学演化。 这项研究将通过与美国自然历史博物馆合作的两个项目与 PI 的教育计划相结合。 莫贾兹教授将教授题为“宇宙爆炸”的课后课程。 课程将围绕教学法构建，该教学法可能会改变学生对科学过程的看法，使用增强年轻女性和代表性不足群体学习的策略和指导。 此外，PI 将协调纽约市地区天文学部门的天文学家参与 AMNH 的科学研究指导计划。 通过该计划，高中生将参与前沿研究并在研讨会上展示他们的成果。