Collaborative Research: The Evolution of Gas in Protoplanetary Disks

合作研究：原行星盘中气体的演化

• 批准号: 2205870
• 负责人: Ilaria Pascucci
• 金额: $ 30.52万
• 依托单位: University of Arizona
• 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=2205870&HistoricalAwards=false
• 关键词: Collaborative; Research; Evolution; Gas; Protoplanetary

The objective of the proposed work is to build understanding of the behavior and evolution of gas in protoplanetary disks. Up to 99% of the mass of a protoplanetary disk consists of gas. However, astronomers do not have even a basic understanding of the evolution of the gas component or what factors drive such evolution. Observations of protoplanetary disks, collected with the ALMA radio observatory, will be used to test the two leading theories of disk evolution. The UW-Madison group will design and provide a regular 1-hour long hands-on session on the topic of radio waves for student group visitors at the UW-Madison Space Place, a local outreach and educational center. In Tucson, AZ, the UA group will develop a one day workshop for K-12 teachers on the topic of radio waves, by collaborating with the Pima County School Superintendent's Office. In addition, this work will provide research experience to graduate students, undergraduates, and a post-doc.This project will provide a legacy library of robust measurements of gas disk masses and sizes in a well-defined sample spanning over the whole disk lifetime (0.1-10 Myr). Such library will be critical to test any current and future theories of disk evolution. This project will gather breakthrough data to map the evolution of gas in protoplanetary disks, through the ALMA survey of Gas Evolution in PROtoplanetary disk, AGE-PRO, an accepted ALMA Cycle 8 large program (103 h, PI. Zhang). They will collect and analyze deep ALMA observations of a comprehensive sample of disks throughout the typical disk lifetime. By combining AGE-PRO observations and state-of- the-art thermo-chemical models, the team will provide accurate gas mass measurements of these disks (10-20 times better accuracy than existing constraints), as well as detailed surface density distributions of gas in these disks. They will then run a large grid of disk evolution models under different disk evolution mechanisms. Comparing their gas distribution measurements from observations with that of disk evolution models, they will provide critical tests to the two leading theories of disk evolution: turbulent viscosity and magneto-hydrodynamical disk winds.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.

提出的工作的目的是建立对原行星盘中气体的行为和演化的理解。原行星盘高达99%的质量是由气体组成的。然而，天文学家甚至对气体成分的演变以及驱动这种演变的因素都没有基本的了解。ALMA射电天文台收集的原行星盘观测数据将用于检验两种主要的圆盘演化理论。威斯康星大学麦迪逊分校小组将在威斯康星大学麦迪逊分校空间广场（当地的一个外展和教育中心）为学生团体游客设计并提供一个关于无线电波主题的定期1小时的实践课程。在亚利桑那州图森市，UA小组将与皮马县学校督学办公室合作，为K-12教师举办为期一天的无线电波主题研讨会。此外，这项工作将为研究生、本科生和博士后提供研究经验。该项目将在整个磁盘生命周期（0.1-10 Myr）内提供一个可靠的气体磁盘质量和大小测量的传统库。这样的库对于测试任何当前和未来的磁盘演化理论都是至关重要的。本项目将通过ALMA对原行星盘气体演化的调查，AGE-PRO，一个公认的ALMA Cycle 8大型程序（103 h， PI），收集突破性的数据来绘制原行星盘气体演化图。张)。他们将在典型的磁盘生命周期内收集和分析深度ALMA对磁盘的全面样本的观测。通过结合AGE-PRO观测和最先进的热化学模型，该团队将提供这些圆盘的精确气体质量测量（比现有限制精度高10-20倍），以及这些圆盘中气体的详细表面密度分布。然后，他们将在不同的磁盘演化机制下运行磁盘演化模型的大型网格。将观测所得的气体分布测量结果与圆盘演化模型的结果进行比较，他们将为两种主要的圆盘演化理论——湍流黏度和磁流体动力圆盘风——提供关键的检验。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。