Collaborative Research: SHINE: Solar Longitude Dependence of Solar Energetic Particle Events

合作研究：SHINE：太阳高能粒子事件的太阳经度依赖性

• 批准号: 0454104
• 负责人: Mihir Desai
• 金额: $ 1.11万
• 依托单位: University of Maryland, College Park
• 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: 2005-01-01 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0454104&HistoricalAwards=false
• 关键词: Collaborative; Research; SHINE; Solar; Longitude

This proposal includes seven collaborators and will systematically examine the longitude dependence of solar energetic particle (SEP) characteristics through studying: (1) solar data from SOHO, TRACE, Yohkoh, and RHESSI; (2) SEP data from the Solar Isotope Spectrometer (SIS) and the Ultra Low Energy Isotope Spectrometer (ULEIS), both on the Advanced Composition Explorer (ACE) spacecraft; and (3) radio data from Wind/WAVES, Culgoora, and Bruny Island, Australia. Identified SEP events will be characterized according to several criteria, including elemental abundances and ratios measured at a range of MeV energies per nucleon. Radio signatures, shock transit speeds, CME speeds, flare magnitudes, flare durations, flare longitude/magnetic connections (and other relevant parameters) will then be examined in terms of this characterization. Particular focus will be placed on radio type III bursts as indications of open magnetic field lines and the solar connection to the identified flares of interest, as determined by the potential field source surface (PFSS) model. How the characterization of the SEP events depends on solar longitude (accounting for the magnetic connection) will be important in evaluating and constraining any theory attempting to provide explanations for the large variation in the energy-dependent elemental composition observed in SEP events. This effort will help quantify the plausibility of the currently competing hypotheses.Results will be disseminated to the broader community through campaign web sites, peer-reviewed scientific journals, and public newsletters, as well as through future SHINE meetings, where students are especially encouraged (and often funded) to attend. The benefit of this research to society is strongly related to the increasing need to predict space weather and the SEP-related radiation hazards faced by astronauts, sensitive space equipment, and even some commercial airline flights. In particular, SEP longitude dependence is crucial for forecasting the effects at locations far from the Sun-Earth line, as will be necessary within NASA's new Space Exploration Initiative. In order to make useful space weather predictions at any location, understanding the connection between what is observed remotely at the Sun and the resulting SEP event is critical. The proposed research furthers this endeavor in an area of currently vigorous debate. This proposal employs two women (one being the PI) and includes funds for training an undergraduate student. Many of the collaborators have a strong history of collaboration in the fields of radio spectrometry, solar physics, and particle physics, as well as in giving presentations to young scientists and students at colleges, high schools, and middle schools.

这项建议包括七个合作者，将通过研究以下方面系统地审查太阳高能粒子特性的经度依赖性：（1）SOHO、TRACE、Yohkoh和RHESSI提供的太阳数据;（2）高级成分探测器航天器上的太阳同位素光谱仪和超低能同位素光谱仪提供的太阳高能粒子数据;（3）来自澳大利亚Culgoora和Bruny Island的Wind/WAVES无线电资料。已确定的SEP事件将根据几个标准进行表征，包括在每核子MeV能量范围内测量的元素丰度和比率。无线电信号，冲击过境速度，日冕物质抛射速度，耀斑的大小，耀斑持续时间，耀斑经度/磁连接（和其他相关参数），然后将检查在此方面的特性。特别重点将放在无线电III型爆发作为开放磁场线和太阳连接到已确定的耀斑的兴趣，确定的潜在场源表面（PFSS）模型的迹象。SEP事件的特征如何取决于太阳经度（占磁连接）将是重要的，在评估和约束任何理论，试图提供解释的大变化，在SEP事件中观察到的能量依赖的元素组成。这项工作将有助于量化目前相互竞争的假设的可行性，并将通过运动网站、同行评议的科学期刊和公共通讯以及未来的SHINE会议向更广泛的社区传播结果，特别鼓励学生参加（并经常资助学生）。这项研究对社会的好处与预测空间天气和宇航员、敏感空间设备甚至一些商业航班面临的SEP相关辐射危害的需求日益增加密切相关。特别是，SEP经度依赖性对于预测远离日地线的位置的影响至关重要，这在NASA新的太空探索计划中是必要的。为了在任何地点进行有用的空间天气预测，了解在太阳上远程观测到的情况与由此产生的SEP事件之间的联系至关重要。拟议中的研究在目前激烈辩论的领域进一步推动了这一奋进。该提案雇用了两名妇女（其中一名是PI），并包括培训一名本科生的资金。许多合作者在无线电光谱学，太阳物理学和粒子物理学领域都有很强的合作历史，以及在大学，高中和中学向年轻科学家和学生做演讲。