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| Paper: |
Modeling Low-mass Stars in the Presence of Magnetic Fields |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
1209 |
| Authors: |
Mullan, D. J.; MacDonald, J. |
| Abstract: |
In the presence of a vertical magnetic field, the onset of convection in a star is inhibited relative to its onset in a
non-magnetic star.
Following early work of Gough and Tayler for a perfectly conducting medium, and including subsequent modifications due to finite
magnetic resistivity, we have computed models of low-mass stars using a magnetically-altered criterion for the
onset of convection.
Our models have larger radii and cooler effective temperatures than non-magnetic models with the same mass and age.
Our magnetic models provide a unified framework for interpreting a range of observational data, including radii which are observed to be “bloated”
by as much as 10% relative to standard models, and reduced
effective temperatures, for stars ranging in spectral types from solar to brown dwarfs. |
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