Ultra-low-frequency dust-electromagnetic modes in self-gravitating magnetized dusty plasmas |
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Authors: | AK Banerjee MN Alam AA Mamun |
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Institution: | (1) Department of Physics, Jahangirnagar University, 1342 Savar, Dhaka, Bangladesh |
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Abstract: | Obliquely propagating altra-low-frequency dust-electromagnetic waves in a self-gravitating, warm, magnetized, two fluid dusty
plasma system have been investigated. Two special cases, namely, dust-Alfvén mode propagating parallel to the external magnetic
field and dustmagnetosonic mode propagating perpendicular to the external magnetic field have also been considered. It has
been shown that effects of self-gravitational field, dust fluid temperature, and obliqueness significantly modify the dispersion
properties of these ultra-low-frequency dust-electromagnetic modes. It is also found that in parallel propagating dust-Alfvén
mode these effects play no role, but in obliquely propagating dust-Alfvén mode or perpendicular propagating dust-magnetosonic
mode the effect of self-gravitational field plays destabilizing role whereas the effect of dust/ion fluid temperature plays
stabilizing role. |
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Keywords: | Self-gravitating magnetized dusty plasma ultra-low-frequency dust-electromagnetic modes parallel propagation oblique propagation distabilizing effect |
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