Resonant Contact Binaries in the Trans-Neptunian Belt

跨海王星带中的共振接触双星

• 批准号: 2109207
• 负责人: Audrey Thirouin
• 金额: $ 35.25万
• 依托单位: Lowell Observatory
• 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=2109207&HistoricalAwards=false
• 关键词: Resonant; Contact; Binaries; Trans; Neptunian

This project carried out by Lowell Observatory is to examine Trans-Neptunian Objects (TNOs), which are dwarf planets that orbit the Sun at average distances greater than Neptune. The most famous and the first TNO to be discovered, is Pluto. TNOs are the leftovers of Solar System formation. By studying them, key information about the early Solar System and, by extension, the history of exoplanet systems can be constrained. With exoplanet science growing fast with the discovery and characterization of thousands of exoplanets, and trans-Neptunian-like belts around them, the need to better understand local small body populations for context is growing. This project is a comprehensive study of contact binary TNOs, which are bodies consisting of two connected lobes. The aim of the project is to understand their formation, history, and population. The data to be collected promises to be the largest comprehensive sample of contact binary properties yet obtained. The results will help us better interpret the properties of the contact binary Arrokoth, visited by NASA’s New Horizons mission. The Broader Impacts of this project include participation in “Meet an Astronomer” Nights and other public talks hosted by Lowell Observatory. An undergraduate student will also be recruited to participate in the research.The observations in this project will be used to examine the resonant TNOs through lightcurve and color studies. By studying resonant TNOs, rotational and physical properties of these objects will be ascertained while also probing the contact binary population. This will allow the shape, period, and color distributions to be constrained for each tested resonance. Together, these efforts will contribute to an improved understanding of the trans-Neptunian belt and contact binaries, as well as their formation which is critical to understand Arrokoth. A comparison of the results from this study with the results from the second flyby of the New Horizons spacecraft will allow an in-depth understanding of the contact binaries, planet formation, and by extension, exo-planetary systems and disks. The project has wide-ranging significance for various areas of astronomy including small body research and Solar System formation and evolution. Understanding how contact binaries form and how efficient the process of formation is will provide insights into the very early solar system and the formation of planetesimals, which are the building blocks of the planets. An improved understanding of our Solar System will also facilitate more meaningful comparisons to extra-solar planetary systems and protoplanetary disks.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.

这个项目是由洛厄尔天文台进行的，目的是研究海王星外天体（TNOs），它们是矮行星，绕太阳运行的平均距离比海王星还要大。最著名也是第一个被发现的TNO是冥王星。外海王星外天体是太阳系形成的残留物。通过对它们的研究，我们可以了解早期太阳系的关键信息，进而了解系外行星系统的历史。随着系外行星科学的快速发展，成千上万颗系外行星的发现和特征，以及它们周围的跨海王星带，更好地了解当地小天体种群背景的需求正在增长。这个项目是一个接触二元TNOs的综合研究，它是由两个相连的叶组成的物体。该项目的目的是了解它们的形成、历史和数量。即将收集的数据有望成为迄今为止获得的最大的接触二元性质综合样本。这些结果将帮助我们更好地解释接触双星Arrokoth的特性，该双星曾被美国宇航局的新视野号访问过。这个项目更广泛的影响包括参加“遇见天文学家”之夜和其他由洛厄尔天文台主办的公开讲座。还将招募一名本科生参与研究。本项目的观测结果将用于通过光曲线和颜色研究来检验谐振TNOs。通过研究谐振TNOs，可以确定这些天体的旋转和物理性质，同时还可以探测接触双星居群。这将允许形状，周期和颜色分布，以约束每个测试的共振。总之，这些努力将有助于更好地了解海王星外带和接触双星，以及它们的形成，这对了解Arrokoth至关重要。将这项研究的结果与新视野号宇宙飞船第二次飞掠的结果进行比较，将使我们深入了解接触双星、行星形成，进而了解系外行星系统和盘。该项目对天文学的各个领域具有广泛的意义，包括小天体研究和太阳系的形成和演化。了解接触双星是如何形成的，以及形成过程的效率如何，将有助于了解早期太阳系和星子的形成，星子是行星的基石。对太阳系的进一步了解也将有助于对太阳系外行星系统和原行星盘进行更有意义的比较。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。

项目成果

Lightcurves and Rotations of Trans-Neptunian Objects in the 2:1 Mean Motion Resonance with Neptune

与海王星 2:1 平均运动共振中海王星外天体的光曲线和旋转

• DOI: 10.3847/psj/ac7ab8
• 发表时间: 2022
• 期刊: The Planetary Science Journal
• 作者: Thirouin, Audrey;Sheppard, Scott S.
• 通讯作者: Sheppard, Scott S.