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@article{Archer:2013:10.1002/grl.50979,
author = {Archer, MO and Hartinger, MD and Horbury, TS},
doi = {10.1002/grl.50979},
journal = {Geophysical Research Letters},
pages = {5003--5008},
title = {Magnetospheric “magic” frequencies as magnetopause surface eigenmodes},
url = {http://dx.doi.org/10.1002/grl.50979},
volume = {40},
year = {2013}
}

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TY  - JOUR
AB  - Abstract. The persistent so-called “magic” magnetospheric frequencies are thought to be either directly driven by monochromatic solar wind pressure fluctuations or resonantly excited global (cavity/waveguide) or magnetopause surface eigenmodes. We distinguish between these cases by statistically investigating, using simultaneous observations, the magnetospheric response to jets in the subsolar magnetosheath. The broadband jets do not exhibit discrete frequencies, but do drive waves at the discrete “magic” frequencies, with both direct and resonant driving. We show that the expected fundamental frequencies of magnetopause surface eigenmodes have two preferential values over a wide range of upstream conditions, corresponding to fast and slow solar wind, and that their harmonics are in good agreement with the “magic” frequencies. We also show that the waves are largely inconsistent with global modes outside the plasmasphere. Thus we conclude that these “magic” frequencies are most likely due to magnetopause surface eigenmodes.
AU  - Archer,MO
AU  - Hartinger,MD
AU  - Horbury,TS
DO  - 10.1002/grl.50979
EP  - 5008
PY  - 2013///
SP  - 5003
TI  - Magnetospheric “magic” frequencies as magnetopause surface eigenmodes
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1002/grl.50979
UR  - http://hdl.handle.net/10044/1/14461
VL  - 40
ER  -

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