Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 34, issue 4
Articles | Volume 34, issue 4
https://doi.org/10.5194/angeo-34-421-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-34-421-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 34, issue 4
ANGEO Communicates
 | 
13 Apr 2016
ANGEO Communicates |  | 13 Apr 2016

The influence of resistivity gradients on shock conditions for a Petschek reconnection geometry

Christian Nabert and Karl-Heinz Glassmeier

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Short summary
Electrical resistivity can influence the occurrence of shock waves. We derive analytically necessary conditions for shocks in a nonuniform resistive magnetohydrodynamic plasma. The nonuniform resistivity significantly modifies the characteristic velocity of wave propagation. A sufficient gradient of the resistivity in a diffusion region can satisfy the necessary condition for the occurrence of slow shocks, which is related to Petschek reconnection.
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