Coronal Streamer Belt Morphology

日冕流带形态

• 批准号: 9805064
• 负责人: Nancy Crooker
• 金额: --
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805064&HistoricalAwards=false
• 关键词: Coronal; Streamer; Belt; Morphology

Results from SOHO satellite investigations indicate the solar corona streamer belt (extending from a band circling the sun into interplanetary space) envelop multiple current sheets, and have nearly continuous outflow of multiscale transients, ranging from small 'puffs' to large-scale coronal mass ejections. The investigator feels these observations strongly support the interplanetary view of the streamer belt, and is providing a morphological basis for future space weather prediction at this level. She analyzes (1) interplanetary data from the solar minimum, covering extended periods of streamer belt immersion, for magnetic topology using the heat flux polarity test; (2) interplanetary data from the stream interface (a heliospheric structure), traditionally treated as steady-state, for transient signatures and interaction effects; and (3) interplanetary signatures of structures causing major geomagnetic storms and coronal mass ejections for magnetic topology in the context of solar and heliospheric topology. Finally, she is statistically studying coronagraph data for preferred solar longitudes of coronal mass ejections. In all, the research advances understanding of coronal streamer belt structures, their interaction with high-speed flows, and their impact on Earth.

SOHO卫星调查的结果表明，太阳日冕流光带(从环绕太阳的带延伸到行星际空间)包裹着多个电流片，并几乎连续地流出多个尺度的瞬变，从小的喷发到大规模的日冕物质抛射。研究人员认为，这些观测结果有力地支持了流光带的星际观点，并为未来这一级别的空间天气预测提供了形态基础。她分析了(1)来自太阳极小的星际数据，涵盖流光带浸没的延长时期，以确定磁拓扑；(2)来自流界面(日球层结构)的星际数据，传统上被视为稳态，以获得瞬变特征和相互作用影响；(3)引起重大地球磁暴和日冕物质抛射的结构的行星际特征，以获得太阳和日球层拓扑中的磁拓扑。最后，她正在对日冕仪数据进行统计研究，以获得日冕物质抛射的首选太阳经度。总而言之，这项研究促进了对日冕流光带结构、它们与高速气流的相互作用以及它们对地球的影响的理解。