AGS-PRF: Novel Analyses of Total Solar Eclipse Data as a Tool for Coronal Physics

AGS-PRF：日全食数据的新颖分析作为日冕物理学的工具

• 批准号: 2028173
• 负责人: Benjamin Boe
• 金额: $ 19万
• 依托单位: Boe, Benjamin R
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-10-01 至 2022-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2028173&HistoricalAwards=false
• 关键词: AGS; PRF; Novel; Analyses; Total

A total solar eclipse (TSE) is a rare event where the shadow of the moon blocks out the surface of the Sun on the Earth. This enables scientists to study the very hot, tenuous outer layer of the Sun, known as the corona. This project will enable a postdoctoral research fellow to study TSE observations to understand the solar wind and corona – which is important in predicting space weather effects. The project also supports outreach activities with the local Hawaiian community, through a high school scholars’ program and additional outreach and mentoring activities.The work includes four distinct sub-projects on coronal physics based on existing white-light and narrowband emission line data from TSE observations: (i) An investigation of solar wind source regions in the corona using freeze-in distance and temperature diagnostics; (ii) A Differential Emission Measure (DEM) analysis using multiple Fe lines; (iii) Absolute calibrations of the imaging data to determine the density and structure of both the K corona (electron scattering), F corona (dust scattering) and absolute line emission; and (iv) Compare the TSE results with cutting edge coronal and solar wind models which make explicit predictions that can be tested with TSE observations.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.

日全食（TSE）是一种罕见的事件，月球的阴影遮挡了地球上的太阳表面。这使得科学家能够研究太阳非常热、脆弱的外层，即日冕。该项目将使一名博士后研究员能够研究 TSE 观测结果，以了解太阳风和日冕——这对于预测太空天气影响非常重要。该项目还通过高中学者计划以及额外的外展和指导活动，支持与夏威夷当地社区的外展活动。这项工作包括四个不同的日冕物理子项目，这些子项目基于来自 TSE 观测的现有白光和窄带发射线数据：(i) 使用冻结距离和温度诊断对日冕中的太阳风源区域进行调查； (ii) 使用多条 Fe 线进行差分发射测量 (DEM) 分析； (iii) 成像数据的绝对校准，以确定 K 电晕（电子散射）、F 电晕（灰尘散射）和绝对线发射的密度和结构； (iv) 将 TSE 结果与尖端的日冕和太阳风模型进行比较，这些模型做出了可以通过 TSE 观测进行检验的明确预测。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值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

Identifying the Coronal Source Regions of Solar Wind Streams from Total Solar Eclipse Observations and in situ Measurements Extending over a Solar Cycle

• DOI: 10.3847/2041-8213/abe775
• 发表时间: 2021-03
• 期刊: The Astrophysical Journal Letters
• 作者: S. Habbal;M. Druckmüller;N. Alzate;A. Ding;Judd Johnson;P. Štarha;J. Hoderová;B. Boe;S. Constant

The Double-bubble Coronal Mass Ejection of the 2020 December 14 Total Solar Eclipse

• DOI: 10.3847/2041-8213/ac05ca
• 发表时间: 2021-06
• 期刊: The Astrophysical Journal Letters
• 作者: B. Boe;B. Yamashiro;M. Druckmüller;S. Habbal

The Color and Brightness of the F-corona Inferred from the 2019 July 2 Total Solar Eclipse

• DOI: 10.3847/1538-4357/abea79
• 发表时间: 2021-05-01
• 期刊: ASTROPHYSICAL JOURNAL
• 影响因子: 4.9
• 作者: Boe, Benjamin;Habbal, Shadia;Druckmuller, Miloslav
• 通讯作者: Druckmuller, Miloslav

The Solar Minimum Eclipse of 2019 July 2. II. The First Absolute Brightness Measurements and MHD Model Predictions of Fe x, xi, and xiv out to 3.4 R ⊙

• DOI: 10.3847/1538-4357/ac8101
• 发表时间: 2022-08-01
• 期刊: ASTROPHYSICAL JOURNAL
• 影响因子: 4.9
• 作者: Boe, Benjamin;Habbal, Shadia;Druckmuller, Miloslav
• 通讯作者: Druckmuller, Miloslav