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Nonlinear galactic dynamos |
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| Authors: | David Moss Ilkka Tuominen |
| Affiliation: | 1. Observatory and Astrophysics Laboratory , University of Helsinki , T?htitorninm?ki, SF-00130, Helsinki, Finland;2. Mathematics Department , The University , Manchester M13 9PL, United Kingdom;3. Observatory and Astrophysics Laboratory , University of Helsinki , T?htitorninm?ki, SF-00130, Helsinki, Finland |
| Abstract: | Abstract We present trial calculations for a simple nonlinear ‘‘thick disk'’ galaxy dynamo. The nonlinearity is a simple α-quenching. Our strictly axisymmetric solution demonstrates the possibility of a nonlinear interaction between modes of opposite parity. We suggest that a three dimensional model might exhibit a similar persistent interaction between axisymmetric and non-axisymmetric modes. |
| Keywords: | Dynamos nonlinear galactic. |