木星磁気圏における宇宙塵の経年変化 : 福井工業大学木星デカメータ電波干渉計の成果

概要

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An interferometer system for observation of the Jovian decameter radio waves has been achieved at Awara Campus of Fukui University of Technology. The system consists of three 100m-class baselines with three components of log-periodic Yagi antennas. After continuous works of system establishment during three years, the system has finally been completed in November 2002. By utilizing the newly developed interferometer system observations of the Jovian decameter radio emissions have been carried out; as results of the observations, typical radio emissions from the Io related A and B radio sources and emissions from the Non-Io related sources have clearly been detected with excellent coincidence between fringes, of the interferometer, which have been analyzed for the possible radio sources at Jupiter. A few radio emission events related to the special sources caused by the dust groups which are circulating around Jupiter being ejected from broken nuclei of Shoemaker-Levy 9 comet have been identified. Investigating the trend of the occurrence of the dust related decameter radio emissions it has been concluded that the cosmic dust groups circulating around Jupiter have almost been diffused in space during 8 year since July 1994.
福井工業大学の論文
2004-03-20