Collaborative Research:SLINGSHOT:Decoding Dark Matter through Gravitational Lensing

合作研究：弹弓：通过引力透镜解码暗物质

• 批准号: 2108866
• 负责人: Stephon Alexander
• 金额: $ 32.07万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108866&HistoricalAwards=false
• 关键词: Collaborative; Research; SLINGSHOT; Decoding; Dark

The effects of dark matter can be seen in gravitationally lensed systems where light from a distant galaxy is gravitationally lensed by a foreground galaxy. Analysis of the resulting distorted, magnified, multiple images of the background galaxy provide clues to the nature of dark matter. The principal investigators (PIs) Gleyzer, Ames and Alexander will develop the Strong Lensing Inference and Generative System for Harnessing Observational Telescope Data (SLINGSHOT) framework for simulating realistic gravitational lensing images and applying machine learning algorithms to identify known categories of possible dark matter substructure. The PIs will broaden participation with a series of online lectures on machine learning and astrophysics as part of the National Society of Black Physicists Computational Physics Initiative. The team will also continue to teach data science concepts with Jupyter notebooks through their Creative Open Data Environment (CODER) education and outreach project for K-12 teachers and students.The PIs will establish a baseline for classification of dark matter substructure morphology using both conventional (Bayesian) and machine learning algorithms. They will train the machine learning algorithms in anomaly detection, classification and property estimation using a library of representative dark matter models. Unsupervised anomaly detection techniques will identify promising candidate images in a model-independent manner and localize anomalies for further analysis. The PIs will use the code to analyze gravitational lensing data from the Hubble Space Telescope and the Hyper Suprime-Cam on the Subaru Telescope, in preparation to apply their methods to survey data from the Vera C. Rubin Observatory. The SLINGSHOT toolkit will be made available to the astronomical community.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

暗物质的影响可以在引力透镜系统中看到，其中来自遥远星系的光被前景星系引力透镜。 对由此产生的扭曲、放大的背景星系的多重图像的分析为暗物质的性质提供了线索。首席研究员 (PI) Gleyzer、Ames 和 Alexander 将开发用于利用观测望远镜数据的强透镜推理和生成系统 (SLINGSHOT) 框架，用于模拟真实的引力透镜图像并应用机器学习算法来识别可能的暗物质子结构的已知类别。作为国家黑人物理学家协会计算物理计划的一部分，PI 将通过一系列有关机器学习和天体物理学的在线讲座来扩大参与范围。该团队还将继续通过针对 K-12 教师和学生的创意开放数据环境 (CODER) 教育和外展项目，使用 Jupyter 笔记本教授数据科学概念。PI 将使用传统方法和传统方法建立暗物质子结构形态分类的基线。 （贝叶斯）和机器学习算法。他们将使用代表性暗物质模型库来训练异常检测、分类和属性估计方面的机器学习算法。无监督异常检测技术将以独立于模型的方式识别有希望的候选图像，并定位异常以进行进一步分析。 PI 将使用该代码分析来自哈勃太空望远镜和斯巴鲁望远镜上的 Hyper Suprime-Cam 的引力透镜数据，准备将他们的方法应用于维拉·C·鲁宾天文台的测量数据。 SLINGSHOT 工具包将提供给天文学界。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。