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Magnetic fields in non-convective regions of stars
J. Braithwaite, H. C. Spruit
We review the current state of knowledge of magnetic fields inside stars, concentrating on recent developments concerning magnetic fields in stably stratified (zones of) stars, lea…
The growth of helium burning cores
H. C. Spruit
Helium burning in the convective cores of horizontal branch and `red clump' stars appears to involve a process of `ingestion' of unburnt helium into the core, the physics of which…
Convective settling in main sequence stars: Li and Be depletion
R. Andrássy, H. C. Spruit
The process of convective settling is based on the assumption that a small fraction of the low-entropy downflows sink from the photosphere down to the bottom of the star's envelope…
Small-scale dynamos on the solar surface: dependence on magnetic Prandtl number
I. Thaler, H. C. Spruit
The question of possible small-scale dynamo action in the surface layers of the Sun is revisited with realistic 3D MHD simulations. As in other MHD problems, dynamo action is found…
Overshooting by differential heating
R. Andrássy, H. C. Spruit
On the long nuclear time scale of stellar main-sequence evolution, even weak mixing processes can become relevant for redistributing chemical species in a star. We investigate a pr…