The spatial distribution of energetic ions and electrons in the magnetotail |
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| Institution: | 1. Institute of Environmental Science and Technology, Autonomous University of Barcelona, Spain;2. Center for Geospatial Analytics, NC State University, USA;3. Department of Parks, Recreation, and Tourism Management, NC State University, USA;4. Urban Health Collaborative, Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, Philadelphia, PA, USA;5. Department of Family Medicine and Public Health, University of California San Diego, San Diego, CA, USA;6. Beckman Research Institute, Population Sciences, City of Hope, Duarte, CA, USA;7. Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA;8. Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA;9. Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA;10. Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA;1. Institute of Space Physics and Applied Technology, School of Earth and Space Sciences, Peking University, Beijing, China;2. Space Science Applications Laboratory, Aerospace Corporation, EI Segundo, California, USA |
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| Abstract: | The spatial distributions of energetic ion and electron bursts observed on the IMP 7 and 8 satellites in the Earth's magnetotail were studied. It was found that the ion bursts were more frequently detected in the dusk than in the dawn quarter of the neutral sheet whereas the electron bursts, more frequently in the dawn than the dusk quarter. The degree of dawn-dusk asymmetry is however energy dependent; the distribution for higher energy particle bursts exhibits higher degree of asymmetry. The morphologies of the distributions manifest themselves as seasonal variations of the most probable solar ecliptic latitudes at which the ion and electron bursts were observed. The amplitudes of the variations are about 25° with the seasonal variation for ions leading that for electrons by about 2 months. |
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