Cassini evidence for rapid interchange transport at Saturn

Details Cassini evidence for rapid interchange transport at Saturn Cassini evidence for rapid interchange transport at Saturn

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009p%26ss...57.1779r&link_type=abstract

Planetary and Space Science, Volume 57, Issue 14-15, p. 1779-1784.

Physics

5

Scientific paper

During its tour Cassini has observed numerous plasma injection events in Saturn's inner magnetosphere. Here, we present a case study of one “young” plasma bubble observed when Cassini was in the equatorial plane. The bubble was observed in the equatorial plane at ˜7 Saturn radii from Saturn and had a maximum azimuthal extent of ˜0.25 Rs (Rs=Saturn radius ˜60330 km). We show that the electron density inside the event is lower by a factor ˜3 and the electron temperature higher by over an order of magnitude compared to its surroundings. The injection contains slightly increased magnetic field magnitude of 49 nT compared with a background field of 46 nT. Modelling of pitch angle distributions inside the plasma bubble and measurements of plasma drift provide a novel way to estimate that the bubble originated between 9

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