Imperial College London
Alternate

Professor Southwood

Faculty of Natural Sciences, Department of Physics

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 7770d.southwood CV

 
 
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Location

 

711AHuxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Martin:2020:10.1029/2019ja027727,
author = {Martin, CJ and Ray, LC and Constable, DA and Southwood, DJ and Lorch, CTS and Felici, M},
doi = {10.1029/2019ja027727},
journal = {Journal of Geophysical Research: Space Physics},
title = {Evaluating the ionospheric mass source for Jupiter's magnetosphere: An ionospheric outflow model for the auroral regions},
url = {http://dx.doi.org/10.1029/2019ja027727},
volume = {125},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Ionospheric outflow is the flow of plasma initiated by a loss of equilibrium along a magnetic field line which induces an ambipolar electric field due to the separation of electrons and ions in a gravitational field and other mass dependant sources. We have developed an ionospheric outflow model using the transport equations to determine the number of particles that flow into the outer magnetosphere of Jupiter. The model ranges from 1400 km in altitude above the 1 bar level to 2.5 RJ along the magnetic field line and considers H+ and H3+ as the main ion constituents. Previously, only pressure gradients and gravitational forces were considered in modelling polar wind. However, at Jupiter we need to evaluate the affect of fieldaligned currents present in the auroral regions due to the breakdown of corotation in the magnetosphere, along with the centrifugal force exerted on the particles due to the fast planetary rotation rate. The total number flux from both hemispheres is found to be 1.31.8 x 1028 s1 comparable in total number flux to the Io plasma source. The mass flux is lower due to the difference in ion species. This influx of protons from the ionosphere into the inner and middle magnetosphere needs to be included in future assessments of global flux tube dynamics and composition of the magnetosphere system.
AU  - Martin,CJ
AU  - Ray,LC
AU  - Constable,DA
AU  - Southwood,DJ
AU  - Lorch,CTS
AU  - Felici,M
DO  - 10.1029/2019ja027727
PY  - 2020///
SN  - 2169-9380
TI  - Evaluating the ionospheric mass source for Jupiter's magnetosphere: An ionospheric outflow model for the auroral regions
T2  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1029/2019ja027727
UR  - https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027727
UR  - http://hdl.handle.net/10044/1/80776
VL  - 125
ER  -
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