NSF-CGP Fellowship: Studies of the Solar Corona Using Simultaneous X-ray and Radio Observations

9722489 Kundu该奖项提供资金支持马里兰大学学院公园天文学系Mukul R.Kundu博士为期三个月的研究访问，与日本三高国家天文台Narikura太阳天文台的Takashi Sakurai博士合作。他们的研究涉及使用从日本太空任务Yohkoh和地面射电望远镜，特别是日本的Nobeama射电日光仪同时获得的X射线和无线电数据来研究太阳的日冕和太阳耀斑。研究中包括三个具体项目，涵盖广泛的日冕现象：(1)利用低频和高频射电数据研究由SXT发现的与日冕X射线喷流有关的射电辐射；(2)利用低频和高频射电数据研究活动区域的耀斑生产力；(3)对太阳黑子上方的X射线辐射进行调查，以确定太阳黑子正上方日冕的性质；这将与关于相同黑子上方磁场的射电数据相结合。昆杜博士通过结合无线电和X射线成像数据，为了解太阳的日冕做出了开创性的贡献。樱井博士将把他的理论专长带到从磁能存储和触发机制的角度研究太阳活动区和耀斑的问题上。他们的互补专业知识预计将成为他们合作研究的一笔财富。该项目将为美国科学家提供独特的资源，这些资源在世界其他地方是无法获得的，用于研究太阳的日冕活动。该项目由国家科学基金会和日本基金会全球伙伴关系中心之间的科学奖学金计划提供支持。***

9722489 Kundu This award provides funds to support a three-month research visit by Dr. Mukul R. Kundu, Department of Astronomy, University of Maryland at College Park, for collaboration with Dr. Takashi Sakurai, Narikura Solar Observatory, National Astronomical Observatory, Mitaka, Japan. Their research is concerned with studies of the sun's corona and solar flares using simultaneously obtained X-ray and radio data from the Japanese Space mission Yohkoh and ground based radio telescopes, especially, the Nobeyama Radioheliograph in Japan. Three specific projects included in this research, covering a broad range of coronal phenomena are (1) a study of radio emission associated with coronal X-ray jets discovered by SXT (soft-X-ray brightenings which originate in the low corona and then propagate through the corona along magnetic loops), using both low-frequency and highfrequency radio data; and (2) a study of the evolution of active regions in terms of flare productivity; and (3) a survey of the Xray emission above sunspot umbrae, in order to determine the nature of the corona directly above sunspots; this will be combined with radio data on the magnetic fields above the same spots. Dr. Kundu has made pioneering contributions to the knowledge of the sun's corona using combined radio and X-ray imaging data. Dr.Sakurai will bring his theoretical expertise to the problem of studying solar active regions and flares from the point of view of magnetic energy storage and trigger mechanisms. Their complementary expertise is expected be an asset to their collaborative studies. The project will provide to the U.S. scientist access to unique resources, not available elsewhere in the world, for study of the sun's coronal activities. This project is supported under the Science Fellowship Program between the National Science Foundation and the Japan Foundation Center for Global Partnership. ***