Resolving the source of the solar acoustic oscillations: Preparing for the era of the Daniel K. Inouye Solar Telescope

解决太阳声振荡的来源：为丹尼尔·井上太阳望远镜时代做准备

• 批准号: 1616538
• 负责人: Mark Rast
• 金额: $ 65.17万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2021-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1616538&HistoricalAwards=false
• 关键词: Resolving; source; solar; acoustic; oscillations

Similar to the ringing of a bell, excitations on one portion of the surface of the Sun can cause sound (acoustic) waves to travel through the interior of the Sun and generate vibrations that can be observed elsewhere on the solar surface. Solar scientists can use these acoustic waves to probe the deep interior of the Sun through a process called helioseismology. At the very small size scales that new ground-based solar telescopes such as the Daniel K. Inouye Solar Telescope (DKIST) will be able to observe, little is known about the sources of these acoustic waves. This proposal will investigate the detailed properties of these sources by numerically modeling them and using these models to predict what will be seen through telescope observations. The proposed research will support the training of the next generation of solar scientists. The PI and co-PI will jointly mentor two graduate students, with each student gaining critical experience in the theory, modeling and observation of solar phenomena. This proposal will investigate solar acoustic modes (p-modes) through a combination of theoretical modeling and observation with the Dunn Solar Telescope (DST). Despite the use of p-modes to probe the interior of the Sun through helioseismology, the detailed properties of the sources of solar p-mode excitation are not well known. The proposers will develop detailed numerical simulations to determine the source excitation mechanisms and test their efficiencies. These simulations will be used to generate synthetic spectra, which can be tested to determine their sensitivity to pressure, temperature and velocity fluctuations. Finally, observations with the DST will be used to search for the predicted signatures of these thermodynamic fluctuations in the spectral lines. The work outlined in the proposal will provide important preparatory science necessary to optimize the high spatial and spectral resolution capabilities of the Daniel K. Inouye Solar Telescope (DKIST).

与铃铛的响起相似，太阳表面的一部分上的激发会导致声音（声学）波穿过太阳的内部并产生振动，这些振动可以在太阳表面的其他地方观察到。 太阳能科学家可以通过称为HelioseSology的过程使用这些声波来探测太阳的深度内部。 在非常小的尺度上，新的地面太阳能望远镜（例如Daniel K. Inouye太阳能望远镜（DKIST））将能够观察到，对这些声波的来源知之甚少。 该建议将通过对这些来源进行数字建模并使用这些模型来预测通过望远镜观测值的内容来研究这些源的详细属性。 拟议的研究将支持对下一代太阳科学家的培训。 PI和Co-Pi将共同指导两位研究生，每个学生都在理论，建模和观察太阳现象方面都获得关键经验。 该建议将通过理论建模和观察与邓恩太阳能望远镜（DST）的结合来研究太阳声模式（P模式）。 尽管使用P模型通过热疗学探测太阳的内部，但尚不清楚太阳P模式激发源的详细特性。 建议者将开发详细的数值模拟，以确定源激发机制并测试其效率。 这些模拟将用于生成合成光谱，可以测试这些模拟以确定其对压力，温度和速度波动的敏感性。 最后，将使用DST观察来搜索这些热力学波动在光谱线中的预测特征。 该提案中概述的工作将提供重要的准备科学，以优化丹尼尔·伊诺耶太阳能望远镜（DKIST）的高空间和光谱分辨率能力。