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).

类似于钟声，太阳表面的一部分上的激励可以导致声波（声波）穿过太阳内部，并产生可以在太阳表面其他地方观察到的振动。 太阳科学家可以利用这些声波通过一种称为日震学的过程来探测太阳的深层内部。 在非常小的尺度上，新的地面太阳望远镜，如丹尼尔K。Inouye太阳望远镜（DKIST）将能够观测到，但对这些声波的来源知之甚少。 该提案将通过对这些源进行数字建模并使用这些模型来预测通过望远镜观测将看到的内容来研究这些源的详细特性。 拟议的研究将支持下一代太阳科学家的培训。 PI和co-PI将共同指导两名研究生，每个学生都将获得太阳现象的理论，建模和观察方面的关键经验。 该提案将通过理论建模和邓恩太阳望远镜（DST）观测相结合来研究太阳声模式（p模式）。 尽管通过日震学使用p模式探测太阳内部，但太阳p模式激发源的详细特性并不为人所知。 提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，可以对其进行测试，以确定其对压力，温度和速度波动的敏感性。 最后，观测与DST将被用来搜索这些热力学波动的谱线预测签名。 提案中概述的工作将为优化丹尼尔K的高空间和光谱分辨率能力提供重要的预备科学。Inouye太阳望远镜（DKIST）。