Unraveling the mysteries of small-body ring systems through numerical modeling

通过数值建模揭开小体环系统的神秘面纱

• 批准号: 2206306
• 负责人: Amanda Sickafoose
• 金额: $ 46.52万
• 依托单位: Planetary Science Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2206306&HistoricalAwards=false
• 关键词: Unraveling; mysteries; small; body; ring

Researchers from the Planetary Science Institute seek to characterize the ring systems around small solar system bodies, such as Centaurs and Kuiper Belt Objects. The objective is to understand how they are maintained, given that ring material tends to spread over time. The results of this study could be used to improve understanding of other, larger ring systems. The research team will also develop pedagogical modules for grade 7-9 teachers on rings of the solar system, and they will participate in Girls Camp in South Africa promoting STEM careers. This project aims to understand and identify the fundamental physics at play in the maintenance of these ring systems. Specifically, the goals are to (1) confirm whether a shepherd moon can confine material as observed at Chariklo and Chiron, including constraining the moon’s size and location; (2) discover the mechanisms and underlying causes of unusual structures or features observed in rings around Chariklo; and (3) parameterize the required conditions (including nucleus size, shape, and spin rate) for rings to be stable around small, axisymmetric bodies. The project team plans to carry out N-body simulations of ring particles moving past a satellite using a model previously developed for the study of Saturn and modified for small bodies. Model results will be verified with existing data from stellar occultations and other observations of Chariklo and Chiron.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.

行星科学研究所的研究人员试图描述太阳系小型天体（如半人马座和柯伊伯带天体）周围的环系统。其目的是了解它们是如何保持的，因为环材料往往会随着时间的推移而扩散。这项研究的结果可以用来提高对其他更大的环系统的理解。 该研究团队还将为7-9年级教师开发关于太阳系光环的教学模块，他们将参加南非的女孩营，促进STEM职业。该项目旨在了解和确定在维护这些环系统中起作用的基本物理学。具体来说，目标是（1）确认牧羊人卫星是否可以限制在Chariklo和Chiron观察到的物质，包括限制卫星的大小和位置;（2）发现Chariklo周围环中观察到的异常结构或特征的机制和根本原因;以及（3）参数化所需的条件（包括核的大小、形状和自旋速率），使环在小的轴对称物体周围稳定。该项目小组计划使用以前为研究土星而开发并为小天体而修改的模型，对经过卫星的环粒子进行N体模拟。模型的结果将与现有的恒星掩星和其他观测Chariklo和凯龙星的数据进行验证。这个奖项反映了NSF的法定使命，并已被认为是值得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的支持。