Constraining Jupiter's internal flows using Juno magnetic and gravity measurements

被引：7

作者：

Galanti, E. ^{[1
]}

Cao, H. ^{[2
]}

Kaspi, Y. ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Earth & Planetary Sci, Rehovot, Israel

[2] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 16期

关键词：

Jupiter; flow; gravity; magnetic; optimization; Juno; SEATED ZONAL WINDS; GIANT PLANETS; DEEP; FIELD; MODEL; SATURN; ATMOSPHERE; SPACECRAFT; CASSINI; ORBITS;

D O I：

10.1002/2017GL074903

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Deciphering the flow below the cloud-level of Jupiter remains a critical milestone in understanding Jupiter's internal structure and dynamics. The expected high-precision Juno measurements of both the gravity field and the magnetic field might help to reach this goal. Here we propose a method that combines both fields to constrain the depth-dependent flow field inside Jupiter. This method is based on a mean-field electrodynamic balance that relates the flow field to the anomalous magnetic field, and geostrophic balance that relates the flow field to the anomalous gravity field. We find that the flow field has two distinct regions of influence: an upper region in which the flow affects mostly the gravity field and a lower region in which the flow affects mostly the magnetic field. An optimization procedure allows to reach a unified flow structure that is consistent with both the gravity and the magnetic fields.

引用

页码：8173 / 8181

页数：9

共 31 条

[1] Galileo Doppler measurements of the deep zonal winds at Jupiter [J].

Atkinson, DH ;

Pollack, JB ;

Seiff, A .

SCIENCE, 1996, 272 (5263) :842-843

[2] Jupiter's interior and deep atmosphere: The initial pole-to-pole passes with the Juno spacecraft [J].

Bolton, S. J. ;

Adriani, A. ;

Adumitroaie, V. ;

Allison, M. ;

Anderson, J. ;

Atreya, S. ;

Bloxham, J. ;

Brown, S. ;

Connerney, J. E. P. ;

DeJong, E. ;

Folkner, W. ;

Gautier, D. ;

Grassi, D. ;

Gulkis, S. ;

Guillot, T. ;

Hansen, C. ;

Hubbard, W. B. ;

Iess, L. ;

Ingersoll, A. ;

Janssen, M. ;

Jorgensen, J. ;

Kaspi, Y. ;

Levin, S. M. ;

Li, C. ;

Lunine, J. ;

Miguel, Y. ;

Mura, A. ;

Orton, G. ;

Owen, T. ;

Ravine, M. ;

Smith, E. ;

Steffes, P. ;

Stone, E. ;

Stevenson, D. ;

Thorne, R. ;

Waite, J. ;

Durante, D. ;

Ebert, R. W. ;

Greathouse, T. K. ;

Hue, V. ;

Parisi, M. ;

Szalay, J. R. ;

Wilson, R. .

SCIENCE, 2017, 356 (6340) :821-825

[3] Zonal flow magnetic field interaction in the semi-conducting region of giant planets [J].

Cao, Hao ;

Stevenson, David J. .

ICARUS, 2017, 296 :59-72

[4] Gravity and zonal flows of giant planets: From the Euler equation to the thermal wind equation [J].

Cao, Hao ;

Stevenson, David J. .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2017, 122 (04) :686-700

[5] Power spectral analysis of Jupiter's clouds and kinetic energy from Cassini [J].

Choi, David S. ;

Showman, Adam P. .

ICARUS, 2011, 216 (02) :597-609

[6] Jupiter's magnetosphere and aurorae observed by the Juno spacecraft during its first polar orbits [J].

Connerney, J. E. P. ;

Adriani, A. ;

Allegrini, F. ;

Bagenal, F. ;

Bolton, S. J. ;

Bonfond, B. ;

Cowley, S. W. H. ;

Gerard, J. -C. ;

Gladstone, G. R. ;

Grodent, D. ;

Hospodarsky, G. ;

Jorgensen, J. L. ;

Kurth, W. S. ;

Levin, S. M. ;

Mauk, B. ;

McComas, D. J. ;

Mura, A. ;

Paranicas, C. ;

Smith, E. J. ;

Thorne, R. M. ;

Valek, P. ;

Waite, J. .

SCIENCE, 2017, 356 (6340) :826-U132

[7]

Finocchiaro S, 2010, ADV ASTRONAUT SCI, V136, P1417

[8] Jupiter gravity field estimated from the first two Juno orbits [J].

Folkner, W. M. ;

Iess, L. ;

Anderson, J. D. ;

Asmar, S. W. ;

Buccino, D. R. ;

Durante, D. ;

Feldman, M. ;

Casajus, L. Gomez ;

Gregnanin, M. ;

Milani, A. ;

Parisi, M. ;

Park, R. S. ;

Serra, D. ;

Tommei, G. ;

Tortora, P. ;

Zannoni, M. ;

Bolton, S. J. ;

Connerney, J. E. P. ;

Levin, S. M. .

GEOPHYSICAL RESEARCH LETTERS, 2017, 44 (10) :4694-4700

[9] AB INITIO SIMULATIONS FOR MATERIAL PROPERTIES ALONG THE JUPITER ADIABAT [J].

French, Martin ;

Becker, Andreas ;

Lorenzen, Winfried ;

Nettelmann, Nadine ;

Bethkenhagen, Mandy ;

Wicht, Johannes ;

Redmer, Ronald .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2012, 202 (01)

[10] Estimating Jupiter's Gravity Field Using Juno Measurements, Trajectory Estimation Analysis, and a Flow Model Optimization [J].

Galanti, Eli ;

Durante, Daniele ;

Finocchiaro, Stefano ;

Iess, Luciano ;

Kaspi, Yohai .

ASTRONOMICAL JOURNAL, 2017, 154 (01)

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