DOI: 10.1029/2017JA025113
Scopus记录号: 2-s2.0-85052383144
论文题名: Distribution of Plasma in the Io Plasma Torus as Seen by Radio Occultation During Juno Perijove 1
作者: Phipps P.H. ; Withers P. ; Buccino D.R. ; Yang Y.-M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6207
结束页码: 6222
语种: 英语
英文关键词: Io plasma torus
; Juno
; Jupiter
英文摘要: The moon Io is the dominant plasma source for the Jupiter magnetosphere. The plasma is distributed into a torus of material around Jupiter, called the Io plasma torus. The Juno spacecraft performed its first perijove on 27 August 2016. During this time the spacecraft's X and Ka-band radio signals passed through the Io plasma torus. From the differential Doppler shift of the X and Ka-band frequencies we are able to determine the Io plasma torus total electron content. From the total electron content, we determine that the electron densities are larger than predicted from Voyager-based models by around 35 ± 14% in the cold torus and 38 ± 14% in the torus beyond 5.5 RJ. The ion temperatures were greater than predicted from the models by 44 ± 15% in the cold torus but consistent with models in the torus beyond 5.5 RJ. From the time of maximum total electron content, which is sensitive to the torus location, we also find the Io plasma torus equatorial plane appears to be tilted by about 1.5° more than the nominal centrifugal equator tilt based on the tilt of a dipole magnetic field approximation. Different tilts were found for the cold torus and torus beyond 5.5 RJ. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113357
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Astronomy, Boston University, Boston, MA, United States; Center for Space Physics, Boston University, Boston, MA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Phipps P.H.,Withers P.,Buccino D.R.,et al. Distribution of Plasma in the Io Plasma Torus as Seen by Radio Occultation During Juno Perijove 1[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)