Measurement of Jupiter's asymmetric gravity field
- L Iess 1, W M Folkner 2, D Durante 1, M Parisi 2, Y Kaspi 3, E Galanti 3, T Guillot 4, W B Hubbard 5, D J Stevenson 6, J D Anderson 7, D R Buccino 2, L Gomez Casajus 8, A Milani 9, R Park 2, P Racioppa 1, D Serra 9, P Tortora 8, M Zannoni 8, H Cao 6, R Helled 10, J I Lunine 11, Y Miguel 4, B Militzer 12, S Wahl 12, J E P Connerney 13, S M Levin 2, S J Bolton 7
- L Iess 1, W M Folkner 2, D Durante 1
- 1Sapienza Università di Roma, 00184 Rome, Italy.
- 2Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA.
- 3Weizmann Institute of Science, Rehovot 76100, Israel.
- 4Observatoire de la Côte d'Azur, 06304 Nice, France.
- 5Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona 85721, USA.
- 6California Institute of Technology, Pasadena, California 91125, USA.
- 7Southwest Research Institute, San Antonio, Texas 78238, USA.
- 8Università di Bologna, 47100 Forlì, Italy.
- 9Università di Pisa, 56127 Pisa, Italy.
- 10University of Zurich, 8057 Zurich, Switzerland.
- 11Cornell University, Ithaca, New York 14853, USA.
- 12University of California, Berkeley, California 94720, USA.
- 13NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
- 0Sapienza Università di Roma, 00184 Rome, Italy.
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View abstract on PubMed
Summary
This summary is machine-generated.Jupiter
Area Of Science
- Planetary Science
- Fluid Dynamics
- Geophysics
Background
- Planetary gravity fields are influenced by rotation and internal/atmospheric flows.
- Even gravity harmonics (J2n) relate to rotation; odd harmonics reveal atmospheric dynamics.
- Jupiter's deep atmospheric and interior flows remain incompletely understood.
Purpose Of The Study
- To precisely measure Jupiter's gravity harmonics, including odd ones.
- To investigate north-south asymmetries in Jupiter's gravity field.
- To constrain the depth of Jupiter's atmospheric and interior flows.
Main Methods
- Precise Doppler tracking of the Juno spacecraft during its polar orbit around Jupiter.
- Analysis of Jupiter's gravity harmonics, both even and odd.
- Utilizing measurements to infer wind profiles and atmospheric depth.
Main Results
- Detailed measurements of Jupiter's gravity harmonics were obtained.
- A significant north-south asymmetry in the gravity field was detected.
- The findings indicate the presence and influence of deep atmospheric and interior flows.
Conclusions
- Jupiter's gravity field exhibits asymmetries indicative of dynamic flows.
- The measured gravity harmonics provide insights into the vertical wind profile.
- This study offers precise constraints on the depth of Jupiter's dynamical atmosphere.
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