Collaborative Research: Dynamical Tides in Close Stellar Binaries and Exoplanetary Systems

合作研究:近距离恒星双星和系外行星系统中的动力潮汐

基本信息

  • 批准号:
    2054353
  • 负责人:
  • 金额:
    $ 48.15万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2020
  • 资助国家:
    美国
  • 起止时间:
    2020-09-01 至 2024-06-30
  • 项目状态:
    已结题

项目摘要

Tides are an important factor in many astrophysical settings. Tides can affect life, like tidal cycles on Earth; they can affect geology, as in the intense tidal pull of Jupiter on Io; and can even influence the evolution of stars in binary pairs. A research collaboration between Massachusetts Institute of Technology (MIT) and the University of Virginia (UVA) will analyze tidal friction in close star-star and star-planet binaries and assess the importance of nonlinear fluid dynamics on tides in these systems. Fluid dynamics is the science of how gases and liquids flow, and a nonlinear system is one in which the change in the output has a complicated (not simply linear) mathematical relationship with a change in the input. The principal investigators (PIs) have developed the basic theory and computational methods to study both weakly and strongly nonlinear tidal fluid dynamics. The proposed calculations will advance the state of the art in order to provide physics-based prescriptions for tidal friction over a range of stellar types, evolutionary stages, and degree of nonlinearity of the tide. The detailed calculations and numerical simulations will be distilled into simple prescriptions which may be useful for future investigations by astrophysicists. The MIT PI will serve as a research mentor in the study of tides to a student each year in the MIT Summer Research Program (MSRP). MSRP began as an MIT initiative to address the issue of underrepresentation of African Americans, Mexican Americans, Native Americans and Puerto Ricans in engineering and science in the US. It seeks to identify talented undergraduate students from US institutions who are underrepresented minorities and might benefit from spending a summer (nine weeks) at MIT working in a research group. The UVA PI will mentor undergraduate participants in the Virginia-North Carolina Louis Stokes Alliance for Minority Participation, which seeks to broaden participation of underrepresented minority populations in STEM disciplines.Three projects are proposed: (1) Orbital decay of hot Jupiters driven by weakly nonlinear wave-wave interactions. Previous work on solar-type stars will be expanded to include a range of stellar masses and evolutionary states. (2) Circularization and orbital decay in the strongly nonlinear limit, where wave breaking occurs for gravity waves. Again the goal is to expand previous calculations to the observed range of main sequence stars, as well as sub-giant and red giant branch stars. (3) Nonlinear wave interaction effects on the tide raised in the star and in the planet during high eccentricity planet migration. For each project, a detailed comparison of theoretical predictions to available data will be carried out. This includes close stellar binaries, the hot Jupiters and Neptunes around a variety of main sequence stars, and evolved stars with substellar companions.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.
潮汐是许多天体物理环境中的一个重要因素。潮汐可以影响生命,就像地球上的潮汐周期一样;它们可以影响地质,比如木星对木卫一的强烈潮汐引力;甚至可以影响双星对恒星的演化。麻省理工学院(MIT)和弗吉尼亚大学(UVA)的一项研究合作将分析近距离恒星-恒星和恒星-行星双星中的潮汐摩擦,并评估非线性流体动力学在这些系统中对潮汐的重要性。流体动力学是研究气体和液体如何流动的科学,而非线性系统是一个输出的变化与输入的变化具有复杂(而不是简单的线性)数学关系的系统。主要研究人员发展了研究弱非线性和强非线性潮汐流体动力学的基本理论和计算方法。拟议的计算将推进最先进的技术水平,以便为一系列恒星类型、演化阶段和潮汐的非线性程度提供基于物理的潮汐摩擦力处方。详细的计算和数值模拟将被提炼成简单的处方,这可能对天体物理学家未来的研究有用。麻省理工学院PI将在每年麻省理工学院暑期研究项目(MSRP)中担任潮汐研究的研究导师。MSRP最初是麻省理工学院的一项倡议,旨在解决非裔美国人、墨西哥裔美国人、美洲原住民和波多黎各人在美国工程和科学领域代表性不足的问题。它寻求从美国机构中寻找有才华的本科生,他们是未被充分代表的少数族裔,他们可能会受益于在麻省理工学院度过一个暑假(9周)在一个研究小组工作。UVA PI将指导弗吉尼亚州-北卡罗来纳州路易斯·斯托克斯少数群体参与联盟的本科生参与者,该联盟旨在扩大代表不足的少数群体对STEM学科的参与。提出了三个项目:(1)由弱非线性波波相互作用驱动的热木星的轨道衰变。之前关于太阳类型恒星的工作将扩大到包括一系列恒星质量和演化状态。(2)强非线性极限中的环化和轨道衰变,重力波在此发生破波。同样,我们的目标是将之前的计算扩大到观测到的主序星范围,以及次巨星和红巨星分支恒星。(3)大偏心行星迁移过程中,非线性波相互作用对恒星和行星内潮汐的影响。对于每个项目,将进行理论预测与现有数据的详细比较。这包括近距离恒星双星,围绕各种主序恒星的热木星和海王星,以及有恒星下伴星的演化恒星。这一奖项反映了美国国家科学基金会的法定任务,并通过使用基金会的智力优势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

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Tides in the High-eccentricity Migration of Hot Jupiters: Triggering Diffusive Growth by Nonlinear Mode Interactions
热木星高偏心率迁移中的潮汐:通过非线性模式相互作用触发扩散增长
  • DOI:
    10.3847/1538-4357/ac0a79
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yu, Hang;Weinberg, Nevin N.;Arras, Phil
  • 通讯作者:
    Arras, Phil
Beyond the linear tide: impact of the non-linear tidal response of neutron stars on gravitational waveforms from binary inspirals
超越线性潮汐:中子星非线性潮汐响应对双星螺旋引力波形的影响
Tidal Evolution and Diffusive Growth During High-eccentricity Planet Migration: Revisiting the Eccentricity Distribution of Hot Jupiters
高偏心率行星迁移过程中的潮汐演化和扩散增长:重新审视热木星的偏心率分布
  • DOI:
    10.3847/1538-4357/ac5627
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yu, Hang;Weinberg, Nevin N.;Arras, Phil
  • 通讯作者:
    Arras, Phil
Non-linear dynamical tides in white dwarf binaries
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Nevin Weinberg其他文献

Nevin Weinberg的其他文献

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{{ truncateString('Nevin Weinberg', 18)}}的其他基金

Collaborative Research: Spectral and Radiation Hydrodynamic Models of Photospheric Radius Expansion X-ray Bursts
合作研究:光球半径膨胀X射线爆发的光谱和辐射流体动力学模型
  • 批准号:
    2107218
  • 财政年份:
    2021
  • 资助金额:
    $ 48.15万
  • 项目类别:
    Continuing Grant
Collaborative Research: Dynamical Tides in Close Stellar Binaries and Exoplanetary Systems
合作研究:近距离恒星双星和系外行星系统中的动力潮汐
  • 批准号:
    1909718
  • 财政年份:
    2019
  • 资助金额:
    $ 48.15万
  • 项目类别:
    Standard Grant

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