Statistics – Applications
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..229d&link_type=abstract
Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 229-229
Statistics
Applications
Scientific paper
In many situations an Astrophysical plasma coexist with dust particles. These particles are charged either negatively or positively depending on their surrounding plasma environments. This system of such charged dust, electrons, and ions forms a so-called dusty plasma. In the present work, we present results obtained in recent years for wave propagation in a magnetized dusty plasma, including variable charge of the dust particles, and using a kinetic approach. Two forms of the dielectric tensor are obtained, which can be used depending of the aplication to be done. This dielectric tensor is used in some applications, in order to study the importance and influence of the variable charge on dust particles in the wave propagation characteristics. We first consider the magnetosonic wave and show that the variable charge of the dust gives the possibility of absorption, for a fixed wavevector. We also analyse the spatial absorption of this wave, including effects up to second order in the Larmor radius. Finally we analyse the Alfvén waves behavior in such dusty plasmas. The dispersion relation and damping rates of this mode are obtained and, as an application, the effects are calculated for dusty stellar winds. We have shown that the presence of dust particles with variable charge affects the propagation and absorption of the Alfvén waves in such plasma systems.
de Juli M. C.
Falceta-Goncalves Diego
Jatenco-Pereira Vera
Schneider R. S.
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