4 papers · 1 filter
Dynamo action in M-dwarfs
S. B. F. Dorch, B. V. Gudiksen, H. -G. Ludwig
Magnetic activity in M-dwarfs present enigmatic questions: On the one hand they have higher field strengths and larger filling factors than the magnetic field on the Sun, on the ot…
Dynamo action in late-type giants
S. B. F. Dorch
Recent numerical MHD simulations suggest that magnetic activity may occur in late-type giants. A entire red supergiant with stellar parameters equal to Betelgeuse was modelled in 3…
A Magnetic Betelgeuse? Numerical Simulations of Non-linear Dynamo Action
S. B. F. Dorch
Betelgeuse is an example of a cool super-giant displaying brightness fluctuations and irregular surface structures. Simulations by Freytag et al. (2002) of the convective envelope…
Does Betelgeuse have a magnetic field?
S. B. F. Dorch, B. Freytag
Recent numerical simulations by Freytag et al. of the outer convection envelope of the cool super-giant Betelgeuse, have shown that the fluctuations in the star's apparent luminosi…