Characteristics and variability of Titan's magnetic environment

CESAR L BERTUCCI

Philosophical Transactions of The Royal Society A

Royal Society Publishing

Lugar: Londres; Año: 2009 vol. 367 p. 789 - 798

The structure and variability of Saturn’s magnetic field in the vicinity of Titan’s orbit is studied. In the dawn magnetosphere, the magnetic field presents a significant radial component directed towards Saturn, suggesting that Titan is usually located below theplanet’s warped and dynamic magnetodisc. Also, a non-negligible component along the co-rotation direction suggests that Saturn’s magnetic field lines close to the magnetodisc are being swept back from their respective magnetic meridians. In the noon sector, Titanseems to be closer to the magnetodisc central current sheet, as the field lines in this region seem to be more dipolar. The distance between the central current sheet and Titan depends mainly on the solar wind pressure. Also, dB/B ~ 0.5 amplitude waveforms atperiods close to Saturn’s kilometric radiation period are present in the background magnetic field. This modulation in the field is ubiquitous in Saturn’s magnetosphere and associated with the presence of a rotating asymmetry in the planet’s magnetic field.