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A Modular Model of Jupiter's Magnetospheric Magnetic Field Based on Juno Data
Author(s) -
Wang Jianzhao,
Huo Zhuoxi,
Zhang Lei
Publication year - 2021
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1029/2020ja029085
Subject(s) - jupiter (rocket family) , physics , magnetopause , mercury's magnetic field , magnetic field , current sheet , radius , magnetosphere of jupiter , solar wind , magnetosphere , geophysics , computational physics , interplanetary magnetic field , astronomy , magnetohydrodynamics , spacecraft , computer science , quantum mechanics , computer security
Accurate modeling of Jupiter's magnetospheric magnetic field is important for not only scientific research but also mission planning. We develop a new empirical global model of Jupiter's magnetic field in the Juno era, including components from the planetary dynamo, Chapman‐Ferraro currents, and equatorial current sheet. The internal field is based on the JRM09 model. The shielding field is obtained by minimizing the component normal to Jupiter's magnetopause and varies due to the change of solar wind dynamic pressure. Combined with the curved magnetodisk, the high‐resolution TS07 method is used for modeling Jupiter's magnetodisc and tail currents. The best‐fitting results show an asymmetric magnetodisc current system in azimuthal direction with a tilted angle to Jupiter's magnetic equator. The sweep‐back effects of Jupiter's magnetic fields are also reproduced by the radial current system. This new model is validated by comparing with Juno's magnetometer data in the range from 5 R j to 60 R j , where R j = 71,492 km is the radius of Jupiter.