Atmospheres and Climates of Exoplanets

系外行星的大气和气候

• 批准号: RGPIN-2019-06517
• 负责人: Menou, Kristen
• 金额: $ 2.04万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=716182
• 关键词: Atmospheres; Climates; Exoplanets

Hot Jupiters and Earth-like exoplanets are among the most interesting extrasolar planets amenable to study. Over the next 5-10 years, observational efforts including TESS, SPiROU-NIRPS, JWST and ELTs will dramatically improve the quantity and the quality of the data available to characterize their properties, atmospheres and climates. This brings new and significant modelling opportunities to refine our understanding of these planets. Recently, predictions from the magnetic induction mechanism have been observationally confirmed, making it likely that ohmic dissipation and magnetic drag are responsible for the radius inflation phenomenon in hot Jupiters. As a principal architect of this solution, I propose to lead an effort to refine models of magnetic induction in hot Jupiters so that it can be used as quantitative tool to better understand the structure and evolution of these planets as a population. I will also pursue a program aimed at clarifying the role and magnitude of turbulent vertical transport in hot Jupiter atmospheres. Together, this will illuminate formation scenarios and directly impact our understanding of atmospheric observables for this class of planets. Finding Earth-like habitable planets around nearby stars for follow-up characterization with JWST or ELTs is a key driver of exoplanetary science today. My group has made important contributions regarding the diversity of climates possible on Earth-like exoplanets, in particular cold habitable worlds subject to global climate cycles or habitable snowball states. I will continue to explore the rich parameter space of habitable climate with one major goal: provide the broad context needed to interpret future discoveries. This will be achieved through a well-posed forward-modelling strategy: simulated observations of model climates will be used to understand which aspects of a complex climate system can be reliably inferred from the limited set of observational constraints available to astronomers over the next decade and beyond.

热木星和类地系外行星是最有趣的 适合研究的太阳系外行星。未来5-10年， 包括 TESS、SPIROU-NIRPS、JWST 和 ELT 在内的观测工作将 显着提高数据的数量和质量 可用于表征其属性、气氛和 气候。这给我们带来了新的、重要的建模机会 完善我们对这些行星的理解。 最近，磁感应机制的预测已被提出。 观察证实，这使得欧姆耗散和 磁阻力是造成半径膨胀现象的原因 热木星。作为该解决方案的主要架构师，我建议 领导改进热木星磁感应模型的工作 以便它可以作为定量工具来更好地理解 这些行星作为一个种群的结构和演化。 我也会 实施一项旨在澄清其作用和重要性的计划 热木星大气中的湍流垂直传输。一起， 这将阐明形成场景并直接影响我们 了解此类行星的大气可观测值。 寻找附近恒星周围的类地宜居行星进行后续研究 JWST 或 ELT 的表征是系外行星研究的关键驱动因素 今天的科学。我的团队在这方面做出了重要贡献 类地系外行星上可能存在气候多样性，特别是 受全球气候循环或宜居影响的寒冷宜居世界 滚雪球状态。我会继续探索丰富的参数空间 宜居气候的研究有一个主要目标：提供广泛的背景 需要解释未来的发现。这将通过以下方式实现 适定的正向建模策略：模拟观察 模型气候将用于了解复杂的哪些方面 气候系统可以从有限的一组数据中可靠地推断出来 天文学家未来可用的观测限制 十年及以后。