Seminars & Colloquia----National Astronomical Observatories, Chinese Academy of Sciences

Abstract: I review the results of the series of studies or basic properties of the mechanism of astrophysical dynamo by means of asymptotic WKB solutions of the corresponding equations. For the limit of short waves, equivalent to high magnetic Reynolds number we have used the analogue of methods or semi-classical approach in quantum mechanics. The application of the methods provided the estimates of the key trends of solar and stellar dynamos.
(1) stability of the solar and stellar magnetic cycle period
(2) reversal of the magnetic field dynamo wave to the pole and the equator
(3) increase of magnetic activity towards the direction of the dynamo wave propagation
(4) propagation of magnetic activity waves mainly along constant internal rotation rate (so-called Yoshimura-Parker law)
(5) interaction of the dynamo wave branches across the solar equator
(6) excitation of non-axisymmetric structures with dependence on differential rotation
(7) qualitative change in dynamo waves with meridional circulation