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Linearly coupled oscillations in fully degenerate pair and warm pair-ion astrophysical plasmas |
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| Authors: | S A Khan M Ilyas Z Wazir Zahida Ehsan |
| Institution: | 1. National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan 2. Department of Physics, International Islamic University, Islamabad, Pakistan 3. Department of Physics, Riphah International University, Islamabad, Pakistan 4. COMSATS Institute of Information Technology (CIIT), Defence Road, Off Raiwind Road, Lahore, Pakistan |
| Abstract: | In this paper we study the coexisting low frequency oscillations in strongly degenerate, magnetized, (electron-positron) pair and warm pair-ion plasma. The dispersion relations are obtained for both the cases in macroscopic quantum hydrodynamics approximation. In pair-ion case, the dispersion equation shows coupling of electrostatic and (shear) electromagnetic modes under certain circumstances with important role of ion temperature. Domain of existence of such waves and their relevance to dense degenerate astrophysical plasmas is pointed out. Results are analyzed numerically for typical systems with variation of ion concentration and ion temperature. |
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