Bibcode
Moreno-Insertis, F.; Schuessler, M.; Ferriz-Mas, A.
Referencia bibliográfica
Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. 686-700.
Fecha de publicación:
10
1992
Número de citas
135
Número de citas referidas
117
Descripción
Consideration is given to the suppression of the radial and polar escape
of magnetic flux in the form of toroidal flux tubes (flux rings) from
low latitudes in the overshoot region below the solar convection zone
through the combined action of the subadiabatic ambient stratification
and the rotationally induced forces. It is shown that a flux ring which
is initially in thermal equilibrium with its environment and rotates
with the ambient angular velocity moves radially and latitudinally
towards an equilibrium configuration of lower internal temperature and
larger internal rotation rate with respect to the surrounding
nonmagnetic gas. Flux rings perform superposed buoyancy and inertial
oscillations around their equilibrium positions. From a study of the
frequencies and amplitudes of these oscillations, it is concluded that
flux rings with B of less than about 100,000 G can be kept within the
overshoot region if the superadiabaticity is sufficiently negative,
i.e., less than about -0.00004.