Heliospheric and Planetary Research 2020-2023

日光层和行星研究 2020-2023

• 批准号: ST/T00018X/1
• 负责人: David Burgess
• 金额: $ 79.77万
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FT00018X%2F1
• 关键词: Heliospheric; Planetary; Research; 2020; 2023

We will conduct a programme of research concerning the solar wind in the inner heliosphere and the dynamics of the rings and satellites of Saturn.The Parker Solar Probe spacecraft was launched in August 2018, and will spend 7 years sampling the Sun's plasma, the solar wind, from closer and closer to the solar surface. In the last part of its mission it will be less than 10 solar radii from the Sun, and then could be truly said to be "touching the Sun." This incredibly challenging mission will revolutionize our view of how the Sun's plasma flows from the corona and fills the space of what is called the heliosphere. The solar wind is also the link between the Sun and the Earth, driving the Space Weather that controls the Earth's magnetosphere, and which can have profound effects on technological systems such as satellites and communication networks. The solar wind is hot (much hotter than the surface of the sun), and has a supersonic flow. We will use data from Parker Solar Probe to characterize the solar wind in the inner heliosphere, and show how it changes with distance from the Sun. We will carry out a coordinated programme of research using data analysis and state-of-the-art plasma simulations to reveal the plasma dynamics of the inner heliosphere. This will help us to solve long-standing problems about coronal heating and the acceleration of the solar wind. For example, plasma turbulence is ever-present in the solar wind, and understanding how it contributes to plasma heating, through a cascade of energy from large to small scales, is a key problem in astrophysics. Our results will help us understand how the solar wind flows from Sun and fills the heliosphere. We will also use our results to understand the operation and role of fundamental plasma processes, such as turbulent dissipation, plasma instabilities and shock acceleration, in space and astrophysical plasmas. The outer part of Saturn's main rings is a region where there is an approximate balance between forces that disrupt bodies (tides) and those that bring them together (self-gravity). Here objects can form, interact with surrounding material and even break up due to collisions. We will use the trove of Cassini images to understand these processes and the role of nearby moons. Studying these mechanisms gives a wider insight into planetary formation and evolution. Images of Saturn's moons against background stars over the duration of the mission will continue to be used to place constraint's on models of Saturn's interior while studying the moons' shapes will give us information about their internal structure.

2018年8月，帕克太阳探测器发射升空，将用7年时间从离太阳表面越来越近的地方采集太阳等离子体（太阳风）的样本。在其使命的最后一部分，它将距离太阳不到10个太阳半径，然后可以说是真正的“接触太阳”。“这项极具挑战性的使命将彻底改变我们对太阳等离子体如何从日冕中流出并填充日光层空间的看法。太阳风也是太阳和地球之间的联系，驱动控制地球磁层的空间天气，并对卫星和通信网络等技术系统产生深远影响。太阳风是热的（比太阳表面热得多），并且具有超音速流动。我们将使用来自帕克太阳探测器的数据来描述内日光层中的太阳风，并显示它如何随着与太阳的距离而变化。我们将利用数据分析和最先进的等离子体模拟来开展一项协调一致的研究方案，以揭示内日光层的等离子体动态。这将帮助我们解决长期存在的日冕加热和太阳风加速问题。例如，等离子体湍流一直存在于太阳风中，了解它如何通过从大到小的能量级联来促进等离子体加热，是天体物理学中的一个关键问题。我们的研究结果将帮助我们了解太阳风如何从太阳流动并填充日光层。我们还将利用我们的研究结果来了解基本等离子体过程的操作和作用，如湍流耗散，等离子体不稳定性和冲击加速，在空间和天体物理等离子体。土星主环的外部是一个区域，在这个区域里，破坏物体的力量（潮汐）和把它们聚集在一起的力量（自引力）之间近似平衡。在这里，物体可以形成，与周围的材料相互作用，甚至由于碰撞而破裂。我们将利用卡西尼号的图像来了解这些过程和附近卫星的作用。研究这些机制可以更广泛地了解行星的形成和演化。在使命期间，土星卫星与背景恒星的图像将继续用于对土星内部模型进行约束，而研究卫星的形状将为我们提供有关其内部结构的信息。

项目成果

Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence.

• DOI: 10.1103/physrevlett.125.025102
• 发表时间: 2020-07
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: T. Bowen;A. Mallet;S. Bale;J. Bonnell;A. Case;B. Chandran;A. Chasapis;C. Chen;D. Duan

Ion-scale Electromagnetic Waves in the Inner Heliosphere

• DOI: 10.3847/1538-4365/ab6c65
• 发表时间: 2019-12
• 期刊: The Astrophysical Journal Supplement Series
• 作者: T. Bowen;A. Mallet;Jia Huang;K. Klein;D. Malaspina;M. Stevens;S. Bale;J. Bonnell;A. Case-A.-Cas

Turbulence Characteristics of Switchback and Nonswitchback Intervals Observed by Parker Solar Probe

• DOI: 10.3847/2041-8213/abbd4a
• 发表时间: 2020-12-01
• 期刊: ASTROPHYSICAL JOURNAL LETTERS
• 影响因子: 7.9
• 作者: Bourouaine, Sofiane;Perez, Jean C.;Raouafi, Nour E.
• 通讯作者: Raouafi, Nour E.

Turbulence characteristics of switchbacks and non-switchbacks intervals observed by \emph{Parker Solar Probe}

emph{帕克太阳探测器}观测到的之字形和非之字形区间的湍流特征

• DOI: 10.48550/arxiv.2010.00936
• 发表时间: 2020
• 作者: Bourouaine S

The Evolution and Role of Solar Wind Turbulence in the Inner Heliosphere

• DOI: 10.3847/1538-4365/ab60a3
• 发表时间: 2020-02-01
• 期刊: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
• 影响因子: 8.7
• 作者: Chen, C. H. K.;Bale, S. D.;Whittlesey, P.
• 通讯作者: Whittlesey, P.