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@article{Manners:2019:10.1029/2019gl083899,
author = {Manners, H and Masters, A},
doi = {10.1029/2019gl083899},
journal = {Geophysical Research Letters},
pages = {9344--9351},
title = {First evidence for multipleharmonic standing Alfvén waves in Jupiter's equatorial plasma sheet},
url = {http://dx.doi.org/10.1029/2019gl083899},
volume = {46},
year = {2019}
}
TY - JOUR
AB - Quasiperiodic pulsations in the ultralowfrequency band are ubiquitously observed in the jovian magnetosphere, but their source and distribution have until now been a mystery. Standing Alfvén waves on magnetic field lines have been proposed to explain these pulsations and their large range in observed periods. However, insitu evidence in support of this mechanism has been scarce. Here we use magnetometer data from the Galileo spacecraft to report first evidence of a multipleharmonic ultralowfrequency event in Jupiters equatorial plasma sheet. The harmonic periods lie in the 422min range, and the nodal structure is confined to the plasma sheet. Polarization analysis reveals several ellipticallypolarized odd harmonics, and no presence of even harmonics. The harmonic periods, their polarization, and the confinement of the wave to the plasma sheet, are strong evidence supporting the standing Alfvén wave model. Multipleharmonic waves therefore potentially explain the full range of periods in quasiperiodic pulsations in Jupiters magnetosphere.
AU - Manners,H
AU - Masters,A
DO - 10.1029/2019gl083899
EP - 9351
PY - 2019///
SN - 0094-8276
SP - 9344
TI - First evidence for multipleharmonic standing Alfvén waves in Jupiter's equatorial plasma sheet
T2 - Geophysical Research Letters
UR - http://dx.doi.org/10.1029/2019gl083899
UR - https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019GL083899
UR - http://hdl.handle.net/10044/1/72603
VL - 46
ER -