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| Discovery of Ganymede's magnetic field by the Galileo spacecraft |
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| Author(s): Kivelson MG, Khurana KK, Russell CT, Walker RJ, Warnecke J, Coroniti FV, Polanskey C, Southwood DJ, Schubert G |
| Source: NATURE Volume: 384 Issue: 6609 Pages: 537-541 Published: DEC 12 1996 |
| Times Cited: 130 References: 14 |
| Abstract: THE Galileo spacecraft has now passed close to Jupiter's largest moon-Ganymede-on two occasions, the first at an altitude of 838 km, and the second at an altitude of just 264 km. Here we report the discovery during these encounters of an internal magnetic field associated with Ganymede (the only other solid bodies in the Solar System known to have magnetic fields are Mercury, Earth and probably Io(1)), The data are consistent with a Ganymede-centred magnetic dipole tilted by similar to 10 degrees relative to the spin axis, and an equatorial surface-field strength of similar to 750 nT, The magnetic field is strong enough to carve out a magnetosphere with clearly defined boundaries within Jupiter's magnetosphere, Although the observations require an internal field, they do not indicate its source. But the existence of an internal magnetic field should in itself help constrain models of Ganymede's interior. |
| Document Type: Article |
| Language: English |
| Reprint Address: Kivelson, MG (reprint author), UNIV CALIF LOS ANGELES, INST GEOPHYS & PLANETARY PHYS, LOS ANGELES, CA 90095 USA |
Addresses:
1. UNIV CALIF LOS ANGELES, DEPT EARTH & SPACE SCI, LOS ANGELES, CA 90095 USA
2. UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90095 USA
3. CALTECH, JET PROP LAB, PASADENA, CA 91109 USA
4. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND |
| Publisher: MACMILLAN MAGAZINES LTD, 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: VX769 |
| ISSN: 0028-0836 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |