The auroral mangnetic footprain, an emission spot near the main auroral oval,is the indicator
of interaction between magnetospheric plasma of parent planet and its satellite. In this study
the interaction between Jupiter’s magnetosphere and lo will be studied via the brightness
variation of lo’s magnetic footprint footprints. The far-ultraviolet (FUV) images of lo’s magnetic footprints were taken by the Hubble Space Telescope’s(HST)two instruments,the SpaceTelescope
lmaging Spectrograph(STIS)and the Advanced Camera for Surveys(ACS).The footprint brightness
was found to vary with the locations of the the satellite in jupiter’s magnetosphere.According to
prior observation and modeling,the plasma density in the vicinity of lo also varies in correlation
with the footprint brightness.For further investigation,direct observation of lo’s sodium cloud were compared with the satellite’s magnetic footprint brightness variations. Based on a least square
fit,the modelgenrated power has an acceptable correlation(R>75%)with lo’s magnetic footprint brightness.This large data set shows the strong relation between lo’s magnetic footprint
brightness and the satellte’s plasma environment, indicating the strength of electromagnetic
interaction interaction in the vicinity of lo.
The auroral mangnetic footprain, an emission spot near the main auroral oval,is the indicator
of interaction between magnetospheric plasma of parent planet and its satellite. In this study
the interaction between Jupiter’s magnetosphere and lo will be studied via the brightness
variation of lo’s magnetic footprint footprints. The far-ultraviolet (FUV) images of lo’s magnetic footprints were taken by the Hubble Space Telescope’s(HST)two instruments,the SpaceTelescope
lmaging Spectrograph(STIS)and the Advanced Camera for Surveys(ACS).The footprint brightness
was found to vary with the locations of the the satellite in jupiter’s magnetosphere.According to
prior observation and modeling,the plasma density in the vicinity of lo also varies in correlation
with the footprint brightness.For further investigation,direct observation of lo’s sodium cloud were compared with the satellite’s magnetic footprint brightness variations. Based on a least square
fit,the modelgenrated power has an acceptable correlation(R>75%)with lo’s magnetic footprint brightness.This large data set shows the strong relation between lo’s magnetic footprint
brightness and the satellte’s plasma environment, indicating the strength of electromagnetic
interaction interaction in the vicinity of lo.
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