Europa and Callisto: Induced or intrinsic fields in a periodically varying plasma environment

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Europa and Callisto Induced or intrinsic fields in a periodically varying plasma environment

Magnetometer data from four Galileo passes by the Jovian moon Europa and three passes by Callisto are used to interpret the properties of the plasma surrounding these moons and to identify internal sources of magnetic perturbations. Near Europa the measurements are consistent with a plasma rich in pickup ions whose source is freshly ionized neutrals sputtered off of the moon's surface or atmosp...

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High signal-to-noise ratio spectra of Europa and Callisto’s trailing side show a 0.3% deep 5771 Å absorption band due to condensed O2 at the same wavelength as a stronger band previously identified on Ganymede. Excellent longitudinal coverage for Europa shows that unlike Ganymede, where the band is much stronger on the trailing side, Europa shows no significant longitudinal variation in the O2 ...

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Subsurface Oceans on Europa and Callisto: Constraints from GalileoMagnetometer Observations

Magnetic field perturbations measured during Galileo flybys of Europa and Callisto are consistent with dipole fields induced by the temporal variations of the ambient jovian magnetospheric field. These fields are close to those expected for perfectly conducting moons. We investigate the implications of these observations for the electrical structure of the moon’s interiors using a simple shell ...

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transverse Ising chain with periodically varying bonds and fields

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ژورنال

عنوان ژورنال: Journal of Geophysical Research: Space Physics

سال: 1999

ISSN: 0148-0227

DOI: 10.1029/1998ja900095