HR: 1330h
AN: SM52B-0579    [PDF]
TI: Reformation of perpendicular shocks: EMHD-hybrid Simulations
AU: Paral, J
EM: j.paral@sh.cvut.cz
AF: Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Bocni II/1401, Prague, 14131 Czech Republic
AU: Somr, J
EM: somrj@volny.cz
AF: Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Bocni II/1401, Prague, 14131 Czech Republic
AU: * Travnicek, P
EM: trav@alenka.ufa.cas.cz
AF: Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Bocni II/1401, Prague, 14131 Czech Republic
AB: We study properties of one-dimensional perpendicular shock using hybrid simulations. Standard hybrid simulations treat ions as particles and electrons as a massles isothermal fluid. Ohm law in our model is extended so the time evolution of both the electron parallel and perpendicular temperature is described by an EMHD model. Many numerical studies were already devoted to the properties of one-dimensional perpendicular shocks using particle in cell (PIC) and hybrid codes. It is known that shocks for colder and/or higher Mach numbers show a nonstationary feature, namely a periodic reaperence of a new shock front. These nonstationary shocks have shock front gradient scales governed only by the spatial resolution of the numerical model. We study properties of these shocks by an extended hybrid code and compare the results with previous simulations.
DE: 2154 Planetary bow shocks
DE: 2752 MHD waves and instabilities
DE: 2753 Numerical modeling
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting