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

Nabert, Christian; Glassmeier, Karl-Heinz

doi:https://doi.org/10.5194/angeo-34-421-2016

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.