NSWP: Collaborative Analyses of the Formation, Activation and Long-term Slow Rise of Filaments as Precursors to Coronal Mass Ejections (CMEs)

这个合作的观测和理论研究计划的重点是形成，激活，和长期缓慢上升的太阳细丝之前，他们的喷发作为日冕物质抛射（cme）。这个由来自5个机构的6名科学家组成的团队将使用来自地面望远镜（NSO的ISOON， DST， SOLIS，以及Helio Research和瑞典太阳望远镜）和空间仪器（SOHO的EIT， MDI， LASCO）的高分辨率和中等分辨率数据，并结合理论分析。PI和她的团队将：(1)模拟磁重联在细丝及其被称为“倒刺”的亚结构形成中的作用；(2)研究细丝精细结构与色球结构和光球磁场的关系，以最高可用空间分辨率（0.5-0.15弧秒）识别细丝主体进出质量流；(3)模拟细丝及其倒刺经历局部或全身加速质量运动（称为“激活”）的方式，以及在各种条件下不稳定时倒刺如何从色球层分离；(4)分析现有的多波长Ha多普勒数据，揭示在细丝激活和细丝喷发早期发生的运动类型；(5)研究长丝的缓慢上升作为其不稳定和喷发的早期指标。这些理论和观测研究的一个中心主题是长期被忽视的倒刺在细丝的形成、演化、激活和喷发中的作用。PI还将扩展早期的初步研究，这些研究表明，在长丝喷发前的几天里，长丝的总体高度和质量运动速度都有系统的和零星的增加。作为更广泛影响的一部分，建模、分析和获取新观察结果将涉及至少一名博士后和至少六名本科生。

This collaborative observational and theoretical research proposal focuses on the formation, activation, and the long-term slow ascent of solar filaments prior to their eruption as Coronal Mass Ejections (CMEs). This team of six scientists from five institutions will use high- and medium-resolution data from ground-based telescopes (NSO's ISOON, DST, SOLIS, as well as Helio Research and the Swedish Solar telescopes) and space-borne instruments (SOHO's EIT, MDI, LASCO) in combination with theoretical analysis. The PI and her team will: (1) model the role of magnetic reconnection in the formation of filaments and their substructures known as "barbs;" (2) study the relationships of filament fine-structure to chromospheric structure and photospheric magnetic fields, in order to identify mass flows into and out of the main body of filaments at the highest available spatial resolution (0.5-0.15 arc sec); (3) model the ways that filaments and their barbs can experience local or full body accelerated mass motions (called "activations") and how the barbs detach from the chromosphere when destabilized under various conditions; (4) analyze existing sets of multi-wavelength Ha Doppler data to reveal the types of motions that occur during filament activations and the early stages of filament eruption; and (5) study the long-term slow rise of filaments as an early indicator of their destabilization and eruption.A central theme for both of these theoretical and observational investigations is the long overlooked roles of barbs in the formation, evolution, activation, and eruption of filaments. The PI will also extend earlier preliminary studies indicating that filaments exhibit both systematic and sporadic increases in their overall height and in the velocities of their mass motions during several days preceding filament eruption. As part of the broader impacts, the modeling, analyses, and acquisition of new observations will involve at least one postdoc and at least six undergraduate students.