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

NSWP：对作为日冕物质抛射（CME）前体的细丝的形成、激活和长期缓慢上升的协作分析

• 批准号: 0519249
• 负责人: Sara Martin
• 金额: $ 47.83万
• 依托单位: Helio Research
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-01 至 2009-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0519249&HistoricalAwards=false
• 关键词: NSWP; Collaborative; Analyses; Formation; Activation

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.

这项合作观测和理论研究计划的重点是太阳细丝在日冕物质抛射（CME）喷发之前的形成、激活和长期缓慢上升。这个由来自五个机构的六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）和星载仪器（SOHO 的 EIT、MDI、LASCO）的高分辨率和中分辨率数据，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亚结构（称为“倒刺”）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，以便以最高可用空间分辨率（0.5-0.15角秒）识别进出细丝主体的质量流； （3）模拟细丝及其倒钩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钩如何与色球分离； (4) 分析现有的多波长 Ha 多普勒数据集，以揭示肌丝激活和肌丝爆发早期阶段发生的运动类型； （5）研究细丝的长期缓慢上升，作为其不稳定和喷发的早期指标。这些理论和观察研究的中心主题是倒刺在细丝的形成、演化、激活和喷发中长期被忽视的作用。 PI还将扩展早期的初步研究，表明在细丝喷发前的几天内，细丝的整体高度和质量运动速度表现出系统性和零星的增加。作为更广泛影响的一部分，新观察结果的建模、分析和获取将涉及至少一名博士后和至少六名本科生。