RUI: Imaging and Spectra at the 2023 and 2024 Total Solar Eclipses

对日冕的深入了解仍然是太阳研究中最重要的领域之一。对日食期间日冕的研究一直是威廉姆斯学院天文系成功吸引和培养学生的主要部分。该项目继续进行日食研究，采用独特的地面测量，配合国家科学基金会资助的望远镜进行的天基和地基无线电观测。本科生，包括来自STEM中代表性不足的群体的学生，将接受培训并参与两次日食的观测。日食观测包括使用法布里-珀罗和Lyot/Halle滤波器进行的精美高分辨率观测。观测还包括窄带日冕环的高频（1 Hz）功率谱，以比较日冕加热的机制。光谱观测继续研究太阳活动周期中光谱线比率的变化，通过预测的2024年最低峰，与该组以前的太阳最低峰观测进行比较。此外，将使用NSF资助的Jansky超大阵列进行无线电观测，以提供有史以来最好的活动区域映射，以确定无线电和EUV爆发起源的不同位置，以及欧文斯谷射电天文台和苹果谷的射电望远镜。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

A thorough understanding of the solar corona remains one of the most important areas in solar research. Studies of the solar corona during solar eclipses have been a major part of the success of the Williams College astronomy department in attracting and training students. This project continues solar eclipse studies with unique, ground-based measurements in concert with space-based and ground-based radio observations from NSF-funded telescopes. Undergraduate students, including students from under-represented groups in STEM, will be trained and participating in observations of two solar eclipses.The solar eclipse observations include exquisitely high-resolution observations with a Fabry-Perot and with Lyot/Halle filters. Observations also include high-frequency ( 1 Hz) power spectra of narrow-band coronal loops to compare mechanisms of coronal heating. Spectrographic observations continue to study changes of the spectral-line ratios over the solar-activity cycle through the predicted 2024 low maximum, comparing with previous solar-minimum observations from this group. Additionally, radio observations will be make with the NSF-funded Jansky Very Large Array, to provide the best-ever mapping of active regions to pinpoint the different locations of radio and EUV eruption origins, and Owens Valley Radio Observatory and a radiotelescope in the Apple Valley. The aim is to study differences in the corona during solar minimum and solar maximum.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.