A Simulation for a Planetary Nebular Plasma |
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Authors: | Gulcin Kandemir Senel Boydag |
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Institution: | (1) Department of Physics, Istanbul Technical University, 80626 Maslak/Istanbul, Turkey;(2) Department of Physics, Yildiz Technical University, 80270 Yildiz/Istanbul, Turkey |
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Abstract: | A plasma simulation code is applied to interpret the instabilities in an expanding planetary nebula. The temperature of the
central star of a planetary nebula is assumed as above 50,000 K. Most of the atoms are ionized at this temperature. Since
ionization cannot be neglected for such a hot plasma, the electrostatic instability should be taken into account. In the one
dimensional electrostatic simulation, Maxwell and Vlasov equations are used and the fast Fourier transform is applied. The
calculated drift velocity in the simulation is found comparable with the expansion velocity of a planetary nebula. The linear
and non-linear behaviors of the simulated nebular plasma have been investigated in phase space; the simulation results agree
with the theory.
This revised version was published online in September 2006 with corrections to the Cover Date. |
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