Non-Radial Oscillations and Convective Instability of a Polytrope with a Toroidal Magnetic Field

Details Non-Radial Oscillations and Convective Instability of a Polytrope with a Toroidal Magnetic Field Non-Radial Oscillations and Convective Instability of a Polytrope with a Toroidal Magnetic Field

Dec 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ap%26ss..19..441s&link_type=abstract

Astrophysics and Space Science, Volume 19, Issue 2, pp.441-467

Astronomy and Astrophysics

Astrophysics

7

Scientific paper

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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