Saturn's very axisymmetric magnetic field: No detectable secular variation or tilt

Earth and Planetary Science Letters

Volumn 304, Issue 1-2, 2011, Pages 22-28

  Cao, Hao ^a   Russell, Christopher T ^a   Christensen, Ulrich R ^b   Dougherty, Michele K ^c   Burton, Marcia E ^d  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b MAX PLANCK INSTITUT FÜR SONNENSYSTEMFORSCHUNG   (Germany)

^c IMPERIAL COLLEGE LONDON   (United Kingdom)

^d CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

Interior structure; Magnetic dynamo; Saturn

Indexed keywords

AXIALLY SYMMETRIC; AXISYMMETRIC; CASSINI; INNER MAGNETOSPHERE; INTERIOR STRUCTURE; INTERNAL MODELS; MAGNETIC DYNAMOS; ORDER OF MAGNITUDE; PROBABLE ERRORS; ROTATION RATE; SATURN; SECULAR VARIATION; SPHERICAL HARMONIC COEFFICIENT; STABLE LAYER; UPPER BOUND;

EARTH (PLANET); ELECTRIC GENERATORS; HARMONIC ANALYSIS; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETOMETERS; MAGNETOSPHERE; ROTATION;

INTERACTIVE DEVICES;

GEODYNAMO; HARMONIC ANALYSIS; MAGNETIC FIELD; MAGNETOMETER; MAGNETOSPHERE; SATURN; SOLAR SYSTEM;

EID: 79952620805     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2011.02.035     Document Type: Article

References (30)

1. Anderson J.D., Schubert G. Saturn's gravitational field, internal rotation, and interior structure. Science 2007, 317:1384-1387.
2. Anderson B.J., et al. The magnetic field of Mercury. Space Sci. Rev. 2010, 152:307-339. 10.1007/s11214-009-9544-3.
3. Arridge C.S., Khurana K.K., Russell C.T., Southwood D.J., Achilleos N., Dougherty M.K., Coates A.J., Leinweber H.K. Warping of Saturn's magnetospheric and magnetotail current sheets. J. Geophys. Res. 2008, 113:A08217. 10.1029/2007JA012963.
4. Aubert J. Steady zonal flows in spherical shell dynamos. J. Fluid Mech. 2005, 542:53-67.
5. Barton C.E. Geomagnetic secular variation: direction and intensity. The Encyclopedia of Solid Earth Geophysics 1989, 560-578. Van Nostrand Reinhold, New York. D.E. James (Ed.).
6. Bloxham J., Gubbins D. The secular variation of Earth's magnetic field. Nature 1985, 317:777-781.
7. Burton M.E., Dougherty M.K., Russell C.T. Model of Saturn's internal planetary magnetic field based on Cassini observations. Planet. Space Sci. 2009, 57:1706-1713.
8. Christensen U.R. Dynamo scaling laws: applications to the planets. Space Sci. Rev. 2010, 152:565-590. 10.1017/s11214-009-9553-2.
9. Christensen U.R., Wicht J. Models of magnetic field generation in partly stable planetary cores: application to Mercury and Saturn. Icarus 2008, 196:16-34.
10. Connerney J.E.P., Acuna M.H. Jovimagnetic secular variation. Nature 1982, 297:313-315.
11. Connerney J., Ness N., Acuna M. Zonal harmonic model of Saturn's magnetic field from Voyager 1 and 2 observations. Nature 1982, 298:44-46.
12. Davis L., Smith E. A model of Saturn's magnetic field based on all available data. J. Geophys. Res. 1990, 95:15257-15261.
13. Dougherty M., et al. Cassini magnetometer observations during Saturn orbit insertion. Science 2005, 307:1266-1270. 10.1126/science.1106098.
14. Galopeau P.H.M., Lecacheux A. Variations of Saturn's radio rotation period measured at kilometer wavelengths. J. Geophys. Res. 2000, 105:13089-13101.
15. Holland P.W., Welsch R.E. Robust regression using iteratively reweighted least-squares. Commun. Stat. Theory Methods Appl. 1977, A6:813-827.
16. Jackson A., Jonkers A.R.T., Walker M.R. Four centuries of geomagnetic secular variation from historical records. Philos. Trans. R. Soc. London, Ser. A 2000, 358:957-990. 10.1098/rsta.2000.0569.
17. Jia Y., et al. The interaction of Saturn's magnetosphere and its moons: 1. Interaction between co-rotating plasma and standard obstacles. J. Geophys. Res. 2010, 115:A04214. 10.1029/2009JA014630.
18. Morales M.A., et al. Phase separation in hydrogen-helium mixtures at Mbar pressures. Proc. Natl Acad. Sci. 2009, 106:1324-1329.
19. Read P.L., Dowling T.E., Schubert G. Saturn's rotation period from its atmospheric planetary-wave configuration. Nature 2009, 460:608-610. 10.1038/nature08194.
20. Roberts P.H., Yu Z.J., Russell C.T. On the 60-year signal from the core. Geophys. Astrophys. Fluid Dyn. 2007, 101(1):11-35.
21. Russell C.T., Dougherty M.K. Magnetic fields of the outer planets. Space Sci. Rev. 2010, 152:251-269. 10.1007/s11214-009-9621-7.
22. Sandel B.R., Dessler A.J. Dual periodicity of the Jovian Magnetosphere. J. Geophys. Res. 1988, 93:5487-5504.
23. Sergis N., et al. Particle pressure, inertial force, and ring current density profiles in the magnetosphere of Saturn, based on Cassini measurements. Geophys. Res. Lett. 2010, 37:L02102. 10.1029/2009GL041920.
24. Stanley S. A dynamo model for axisymmetrizing Saturn's magnetic field. Geophys. Res. Lett. 2010, 37:L05201. 10.1029/2009GL041752.
25. Sterenborg M.G., Bloxham J. Can Cassini magnetic field measurements be used to find the rotation period of Saturn's interior. Geophys. Res. Lett. 2010, 37:L11201. 10.1029/2010GL043250.
26. Stevenson D.J. Saturn's luminosity and magnetism. Science 1980, 208:746-748.
27. Stevenson D.J. Reducing the non-axisymmetry of a planetary dynamo and an application to Saturn. Geophys. Astrophys. Fluid Dyn. 1982, 21:113-127.
28. Talboys D.L., Arridge C.S., Bunce E.J., Coates A.J., Cowley S.W.H., Dougherty M.K., Khurana K.K. Signatures of field-aligned currents in Saturn's nightside magnetosphere. Geophys. Res. Lett. 2009, 36:L19107. 10.1029/2009GL039867.
29. Yu Z.J., Russell C.T. Rotation period of Jupiter from the observation of its magnetic field. Geophys. Res. Lett. 2009, 36:L20202. 10.1029/2009GL040094.
30. Yu Z.J., Leinweber H.K., Russell C.T. Galileo constraints on the secular variation of the Jovian magnetic field. J. Geophys. Res. 2010, 115:E03002. 10.1029/2009JE003492.