Non-radial oscillations and convective instability of a polytrope with a toroidal magnetic field |
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| Authors: | N K Sood S K Trehan |
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| Institution: | 1. Department of Mathematics, Panjab University, Chandigarh, India
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| Abstract: | We examine the non-radial modes of oscillation, belonging to spherical harmonics of ordersl=1 andl=3, of a gaseous polytrope with a toroidal magnetic field. We find that a toroidal magnetic field increases the growth rate of convective instability for deformations belonging to the spherical harmonicl=1 whereas it decreases the growth rate of convective instability for deformations belonging to the harmonicsl=2 andl=3. The frequencies of the ‘acoustic’ mode and the ‘Kelvin’ mode are decreased by the presence of the toroidal magnetic field. |
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