U.S.-Japan Cooperative Science: Study of 3-D Solar Wind Structure and Dynamics Using Heliospheric Tomography

该奖项支持加州大学圣地亚哥分校的Bernard Jackson教授和日本名古屋大学的Masayoshi Kojima教授之间为期三年的合作研究项目。研究人员将利用日球层断层摄影术对太阳风的三维结构和动力学进行研究。太阳大气(太阳风及其内部结构)形成了从日冕到地球磁层的日地连接。该项目涉及对太阳遥感数据的分析，这些数据提供了日球层和日冕等离子体的密度、速度和其他物理参数。主要目标将是使用层析成像方法对与地球相互作用的结构进行三维重建和展示。然后，研究人员将使用这些观测数据来更好地定义和回答一些问题，比如经过地球的安静的太阳风结构的形状，它们与周围的太阳风等离子体的相互作用，以及它们在改变嵌入的太阳磁场中的作用。航天器在地球上现场测定的密度、速度和磁场将被用来检查遥感技术的准确性。该项目汇集了两个拥有互补专业知识和研究能力的实验室的努力。研究结果将用于绘制太阳风结构图，确定它们与地球相互作用的程度，并确定它们在太阳上的起源。该技术还可以用于各种地面和天基数据系统。这项研究通过研究生的参与促进了国际人力资源的发展。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际了解和合作。*

9815377Jackson This award supports a three year collaborative research project between Professor Bernard Jackson of the University of California, San Diego and Professor Masayoshi Kojima of Nagoya University in Japan. The researchers will be undertaking a study of 3-D solar wind structure and dynamics using heliospheric tomography. The solar atmosphere (the solar wind and the structures within it) forms a solar-terrestrial connection extending from the corona to the magnetosphere of Earth. This project involves the analysis of solar remotely sensed data, which provide densities, velocities, and other physical parameters of heliospheric and coronal plasmas. The primary goal will be the three-dimensional reconstruction and presentation of structures that interact with the Earth using tomographic methods. The researchers will then use these observational data to better define and answer questions such as the shape of quiet solar wind structures which pass the Earth, their interaction with the ambient solar wind plasma, and their effects in modifying embedded solar magnetic fields. The densities, velocities and magnetic fields determined in situ at Earth by spacecraft will be used to check the accuracy of the remote sensing techniques. This project brings together the efforts of two laboratories that have complementary expertise and research capabilities. Results of the research will be used to map solar wind structures, determine the extent of their interactions with the Earth and locate their origins on the Sun. The technique can also be used with a large variety of ground and space-based data systems. This research advances international human resources through the participation of graduate students. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation.***