A New Model of Jupiter's Magnetic Field From Juno's First Nine Orbits

被引：254
作者：
Connerney, J. E. P. [1 ,2 ]
Kotsiaros, S. [1 ,3 ]
Oliversen, R. J. [1 ]
Espley, J. R. [1 ]
Joergensen, J. L. [4 ]
Joergensen, P. S. [4 ]
Merayo, J. M. G. [4 ]
Herceg, M. [4 ]
Bloxham, J. [5 ]
Moore, K. M. [5 ]
Bolton, S. J. [6 ]
Levin, S. M. [7 ]
机构：
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Space Res Corp, Annapolis, MD 21403 USA
[3] Univ Maryland, College Pk, MD 20742 USA
[4] Tech Univ Denmark, Lyngby, Denmark
[5] Harvard Univ, Cambridge, MA 02138 USA
[6] Southwest Res Inst, San Antonio, TX USA
[7] Jet Prop Lab, Pasadena, CA USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 06期
关键词：
Jupiter magnetosphere; Juno mission; magnetic field; dynamo generation; planetary magnetic field; GEOMAGNETIC-FIELD;
D O I：
10.1002/2018GL077312
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
A spherical harmonic model of the magnetic field of Jupiter is obtained from vector magnetic field observations acquired by the Juno spacecraft during its first nine polar orbits about the planet. Observations acquired during eight of these orbits provide the first truly global coverage of Jupiter's magnetic field with a coarse longitudinal separation of similar to 45 degrees between perijoves. The magnetic field is represented with a degree 20 spherical harmonic model for the planetary ("internal") field, combined with a simple model of the magnetodisc for the field ("external") due to distributed magnetospheric currents. Partial solution of the underdetermined inverse problem using generalized inverse techniques yields a model ('Juno Reference Model through Perijove 9") of the planetary magnetic field with spherical harmonic coefficients well determined through degree and order 10, providing the first detailed view of a planetary dynamo beyond Earth.
引用
收藏
页码：2590 / 2596
页数：7
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