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The Magnetosphere of Jupiter

The only solar system objects known to possess magnetic fields are the Earth, the Sun, and Jupiter. The field of the Earth can be measured directly, of optical emission lines. The first evidence that Jupiter has a magnetic field, and thus far the only evidence, was provided by its polarized radio emissions. Jupiter's field is believed to be considerably stronger than that of the Earth. As in the case of the Earth, Jupiter's field does not extend in­ definitely into space, but is confined to a cavity of unknown size and shape around the planet. Outside this cavity and beyond a transition region, the while that of the Sun has been deduced from the observed Zeemann splitting ambient conditions are characteristic of the interplanetary medium. The region within the cavity, in the space above the ionosphere, is termed the magnetosphere. Inside the magnetosphere, the magnetic field has control over the fast charged particles responsible for much of the Jovian microwave emission, and presumably also a background plasma with a broad spectrum of particl e energi es extending down into the thermal region. Because of the relatively high rotation rate of the planet, its strong magnetic field, and the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Astronomy and Astrophysics Annual Reviews
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