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Saturn's Magnetic Field and Magnetosphere

Smith, E. J. and Davis, L., Jr. and Jones, D. E. and Coleman, P. J., Jr. and Colburn, D. S. and Dyal, P. and Sonett, C. P. (1980) Saturn's Magnetic Field and Magnetosphere. Science, 207 (4429). pp. 407-410. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20140417-140703670

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Abstract

The Pioneer Saturn vector helium magnetometer has detected a bow shock and magnetopause at Saturn and has provided an accurate characterization of the planetary field. The equatorial surface field is 0.20 gauss, a factor of 3 to 5 times smaller than anticipated on the basis of attempted scalings from Earth and Jupiter. The tilt angle between the magnetic dipole axis and Saturn's rotation axis is < 1°, a surprisingly small value. Spherical harmonic analysis of the measurements shows that the ratio of quadrupole to dipole moments is < 10 percent, indicating that the field is more uniform than those of the Earth or Jupiter and consistent with Saturn having a relatively small core. The field in the outer magnetosphere shows systematic departures from the dipole field, principally a compression of the field near noon and an equatorial orientation associated with a current sheet near dawn. A hydromagnetic wake resulting from the interaction of Titan with the rotating magnetosphere appears to have been observed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.207.4429.407DOIArticle
http://www.sciencemag.org/content/207/4429/407PublisherArticle
http://www.jstor.org/stable/1684151JSTORArticle
Contact Email Address:dmiles@caltech.edu
Additional Information:© 1980 American Association for the Advancement of Science. Received for publication 3 December 1979. During encounter operations, B. Tsurutani, R. Walker, and B. Thomas assisted in the data reduction, analysis, and interpretation. We are grateful for the excellent support provided by the Pioneer Project, especially Robert Hogan. Essential support was also provided by J. Mannan, J. Wolf, E. Dobinson, A. Frandsen, D. Clay, B. Connor, G.T. Foster, R. Okida, J. Van Amersfoort, A. Matweecha, D. Winterhalter, and R. Ryan. This article reports one aspect of research carried out by the Jet Propulsion Laboratory for NASA under contract NAS 7-100.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
Pioneer ProjectUNSPECIFIED
NASANAS7-100
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1980-06
Issue or Number:4429
Record Number:CaltechAUTHORS:20140417-140703670
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140417-140703670
Official Citation:SMITH, E. J., DAVIS, L., JONES, D. E., COLEMAN, P. J., COLBURN, D. S., DYAL, P., & SONETT, C. P. (1980). Saturn's Magnetic Field and Magnetosphere. Science, 207(4429), 407-410. doi: 10.1126/science.207.4429.407
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45020
Collection:CaltechAUTHORS
Deposited By: SWORD User
Deposited On:25 Apr 2014 19:43
Last Modified:03 Oct 2019 06:25

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